weekly influenza & respiratory illness activity report
TRANSCRIPT
Minnesota Department of Health651-201-5414 or 1-877-676-5414wwwhealthstatemnus
Weekly Influenza amp Respiratory Illness Activity Report
Week Ending Oct 23 2021 | WEEK 42A summary of influenza surveillance indicators prepared by the Division of Infectious Disease Epidemiology Prevention amp Control
All data are preliminary and may change as more information is received
Minnesota Influenza Surveillance (wwwhealthstatemnusdiseasesflustats)Weekly US Influenza Surveillance Report (wwwcdcgovfluweekly) World Health Organization (WHO) Surveillance (wwwwhointinfluenzasurveillance_monitoringupdatesen) Neighboring statesrsquo influenza information Iowa Iowa Flu Reports (idphiowagovinfluenzareports) Wisconsin Influenza (Flu) (wwwdhswisconsingovcommunicableinfluenza) North Dakota Reported Seasonal Influenza Activity in North Dakota (wwwndflucomdefaultaspx) South Dakota South Dakota Influenza Information (dohsdgovdiseasesinfectiousflu)
Contents
Hospitalized Influenza Surveillance 2Influenza-Associated Death Surveillance 4Respiratory Disease Outbreak Surveillance School Outbreaks 5Respiratory Disease Outbreak Surveillance LTC Outbreaks 6Sentinel Provider Surveillance (Outpatients) 7Laboratory Surveillance 8Minnesota Influenza Incidence Surveillance Project (MIISP) 10Weekly US Influenza Surveillance Report 12
Minnesota Influenza Key Statistics
Percent of molecular laboratory tests positive 01
Hospitalizations 2
Most common strain Influenza A and B
School outbreaks 17
Long-term care outbreaks 1
Pediatric influenza-associated deaths 0
Due to the COVID-19 pandemic CDC and MDH will not be posting the weekly geographic spread indicators (no activity sporadic local regional widespread) this season as they rely on influenza-like illness data (ILI) Because these data are based on symptoms the cause of ILI cannot reliably be attributed to influenza while COVID-19 is widely circulating
Week B (no genotype) B (Yamagata) B (Victoria) A (not subtyped) A H3 A H1 (unspecified) A (H1N1)pdm09 A (H1N2v) A (H3N2v) AampB Unknown
1
1
Week 2015-16 2016-17 2017-18 2018-19 2019-20 2020-21
3 4 0 3 2 0 1
5 1 4 4 5 1 0
1 2 6 11 6 1 1
3 4 10 8 8 1
4 4 7 5 7 1
4 2 13 7 14 2
3 6 20 2 24 3
2 7 43 7 30 5
2 10 54 10 54 1
3 10 87 13 49 1
8 14 123 9 67 0
9 25 246 18 115 0
11 61 557 51 197 2
8 65 631 52 254 2
10 68 584 55 193 1
11 123 664 51 213 4
20 178 594 100 245 0
32 222 479 139 236 5
48 260 430 132 372 1
98 371 393 159 380 1
162 390 359 228 461 0
213 265 242 197 430 1
263 248 166 260 377 1
191 251 140 234 248 0
105 264 106 193 104 0
119 295 106 189 35 0
59 207 123 140 8 1
59 152 91 92 5 0
37 83 53 51 3 0
19 45 45 56 2 0
13 25 42 28 0 0
7 23 19 28 2 0
6 10 9 11 0 0
0
0
5
10
15
20
25
30
35
40
45
50
40 42 44 46 48 50 52 1 3 5 7 9 11 13 15 17 19
Num
ber o
f Hos
pita
lizat
ions
MMWR Week
B (no genotype)
B (Yamagata)
B (Victoria)
A (not subtyped)
A H3
A H1 (unspecified)
A (H1N1)pdm09
A (H1N2v)
A (H3N2v)
AampB
Unknown
050
100150200250300350400450500550600650700
40 42 44 46 48 50 52 1 3 5 7 9 11 13 15 17 19
Num
ber o
f Hos
pita
lizat
ions
MMWR Week
2016-17
2017-18
2018-19
2019-20
2020-21
2021-22
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 2
Hospitalized Influenza Surveillance
Hospitalized influenza cases are based on disease reports of laboratory-positive influenza (via DFA IFA viral culture EIA rapid test paired serological tests or RT-PCR) and specimens from hospitalized patients with acute respiratory illness submitted to MDH-PHL by hospitals and laboratories Due to the need to confirm reports and reporting delays consider current week data preliminary
Hospitalized Influenza Cases by Type Minnesota (FluSurv-NET)
Hospitalizations this week Hospitalizations last week Total hospitalizations (to date)
1 0 2
Hospitalized Influenza Cases by Season Minnesota (FluSurv-NET)
Season Total hospitalizations (historic)
2016-2017 3695
2017-2018 6446
2018-2019 2543
2019-2020 4022
2020-2021 35
2021-2022 2 (to date)FluSurv-NET = Influenza Surveillance Network
Region of hospitalizations Incidence (cases) per 100000 Persons
Central 0 000
Metro 1 003
Northeast 0 000
Northwest 0 000
South Central 0 000
Southeast 0 000
Southwest 1 047
West Central 0 000
Total 2 004
Age of hospitalizations Incidence (cases) per 100000 Persons
0-4 0 000
5-24 0 000
25-49 0 000
50-64 0 000
65+ 2 021
Case Total 2 004
00 00 00 00 00 00
05
0000
10
20
30
40
50
0
5
10
15
20
25
30
35
40
45
50
Cent
ral
Met
ro
Nor
thea
st
Nor
thw
est
Sout
h Ce
ntra
l
Sout
heas
t
Sout
hwes
t
Wes
t Cen
tral
Hospitalizations per 100000 Persons
Num
ber o
f Hos
pita
lizat
ions
Region
of hospitalizations
Incidence (cases) per 100000 Persons
October 3 2021 ndash October 23 2021
00 00 00 00 02
00
10
20
30
40
50
0
5
10
15
20
25
30
35
40
45
50
0-4 5-24 25-49 50-64 65+
Hospitalizations per 100000 Persons
Num
ber o
f Hos
pita
lizat
ions
Age Group (years)
of hospitalizations
Incidence (cases) per 100000 Persons
October 3 2021 ndash October 23 2021
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 3
Hospitalized Influenza Surveillance (continued)Number of Influenza Hospitalizations and Incidence by Region
Minnesota
Median age (years) at time of admission
810
Number of Influenza Hospitalizations and Incidence by Age Minnesota
Region Hospitalizations this week
Total (to date)
Central 0 (0) 0 (0)
Metro 1 (100) 1 (50)
Northeast 0 (0) 0 (0)
Northwest 0 (0) 0 (0)
South Central 0 (0) 0 (0)
Southeast 0 (0) 0 (0)
Southwest 0 (0) 1 (50)
West Central 0 (0) 0 (0)
Week 2015-16 2016-17 2017-18 2018-19 2019-20 2020-21
40 0 0 1 0 0 0
41 0 0 0 0 0 0
42 0 0 0 0 0 0
43 0 0 0 1 0
44 0 1 0 0 0
45 0 2 0 0 1
46 0 1 0 1 0
47 1 2 0 0 0
48 0 1 1 1 0
49 2 2 1 1 0
50 2 9 0 3 0
51 1 12 3 2 0
52 1 12 2 3 0
1 2 31 1 8 3
2 2 49 1 10 1
3 7 35 3 4 0
4 6 48 3 5 1
5 7 32 4 8 1
6 16 36 3 7 0
7 26 30 8 9 0
8 28 27 8 13 0
9 21 25 2 21 0
10 22 12 13 16 0
11 28 16 10 15 0
12 24 7 12 11 0
13 13 11 3 5 0
14 19 10 6 4 0
15 16 9 4 3 0
16 12 5 2 0 0
17 6 4 1 0 0
18 4 2 2 1 0
19 4 2 1 1 0
20 0 2 0 0 0
3 0 0
Week 2015-16 2016-17 2017-18 2018-19 2019-20 2020-21
0-17 2 6 1 3 0 0
18-49 10 10 9 15 2 0
50-64 20 37 16 31 1 0
65-79 60 101 33 51 1 0
80+ 181 281 36 53 3 0
0
5
10
15
20
25
30
35
40
45
50
40 42 44 46 48 50 52 1 3 5 7 9 11 13 15 17 19
Num
ber o
f Dea
ths
MMWR Week of Death
2016-17
2017-18
2018-19
2019-20
2020-21
2021-22
0
50
100
150
200
250
300
0-17 18-49 50-64 65-79 80+N
umbe
r of D
eath
sAge Group (years)
2016-17 2017-18 2018-19 2019-20 2020-21 2021-22
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 4
Influenza-Associated Death Surveillance
Influenza deaths are collected via reports from Minnesotarsquos death certificate database hospitals and long-term care facilities Decedents with influenza listed as a cause of or contributor to death have recent laboratory confirmation of influenza or are part of an ongoing influenza outbreak at a long-term care facility are reported to influenza surveillance Due to the need to confirm reports and reporting delays consider current week data preliminary
Deaths Associated with Influenza by Season Minnesota
Deaths Associated with Influenza by Age Group and Season Minnesota
Season Median age (years) at time of death
2016-2017 86
2017-2018 85
2018-2019 75
2019-2020 73
2020-2021 76
2021-2022 ---FluSurv-NET = Influenza Surveillance Network
Season Total deaths (historic) Total pediatric (lt18 years) deaths (historic)
2016-2017 273 2
2017-2018 440 6
2018-2019 126 1
2019-2020 197 3
2020-2021 7 0
2021-2022 0 0
Week 2016-17dagger 2017-18dagger 2018-19dagger 2019-20dagger 2020-21
40 0 1 1 0 8
41 2 1 3 0 8
42 1 0 1 1 1
43 0 0 4 0
44 2 2 0 0
45 1 4 4 1
46 3 0 7 1
47 2 1 19 0
48 1 1 7 0
49 5 5 14 0
50 19 5 61 0
51 3 6 172 0
52 3 0 5 0
53 5 0 9 0
1 73 12 32 0
2 122 38 121 0
3 77 31 79 0
4 103 8 91 0
5 109 16 79 0
6 66 38 66 0
7 22 30 35 0
8 23 22 44 1
9 4 43 22 0
10 16 33 25 0
11 7 26 2 0
12 3 15 0 0
13 4 12 0 0
14 8 10 0 0
15 8 2 0 0
16 0 5 0 0
17 1 6 0 0
18 3 6 0 0
19 0 4 0 1
20
0
50
100
150
200
40 41 42 43 44 45 46 47 48 49 50 51 52 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Num
ber o
f Inf
luen
za-li
ke Il
lnes
s Out
brea
ks
MMWR Week
2017-18
2018-19
2019-20
2020-21
2021-22
Current week
Note 61 outbreaks were reported pre-season during weeks 37-39
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 5
Respiratory Disease Outbreak Surveillance School Outbreaks
K-12 schools report an outbreak of influenza-like illness (ILI) when the number of students absent with ILI reaches 5 of total enrollment or three or more students with ILI are absent from the same elementary classroom
Influenza-like Illness (ILI) in Schools by Season
New school outbreaks this week New school outbreaks last week Total this season (to date)1 8 17dagger The Week 53 value for these seasons is the average of Week 52 and Week 1
Week 2016-17dagger 2017-18dagger 2018-19dagger 2019-20dagger 2020-21
0 0 0 0 0 1
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
1 0 0 2 1
0 1 1 0 0
1 0 0 1 0
0 5 0 1 1
1 3 0 2 0
2 3 0 0 0
1 1 0 2 0
2 18 1 0 0
3 23 0 6 1
3 36 0 6 0
6 24 2 4 0
9 10 2 7 0
11 13 6 9 0
12 13 5 7 0
11 10 3 6 1
21 13 4 19 0
14 8 6 10 1
12 3 5 11 0
11 4 7 8 0
11 9 4 4 0
7 4 3 0 0
10 6 2 0 0
12 1 0 1 0
6 0 2 0 0
7 0 2 0 0
1 1 2 0 0
3 2 1 0
3 0 1 0
2
0
5
10
15
20
25
30
35
40
40 41 42 43 44 45 46 47 48 49 50 51 52 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Num
ber o
f lab
-con
firm
ed o
utbr
eaks
MMWR Week
2017-18
2018-19
2019-20
2020-21
2021-22
Current week
Note 1 outbreak was reported pre-season during weeks 39
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 6
Respiratory Disease Outbreak Surveillance LTC OutbreaksLong-Term Care (LTC) facilities report to MDH when they suspect an outbreak of influenza in their facility Laboratory-confirmed outbreaks are reported here
Confirmed Influenza Outbreaks in LTC by Season
dagger The Week 53 value for these seasons is the average of Week 52 and Week 1
New LTC outbreacksI this week New LTCoutbreaks last week Total this season (to date)0 0 1
Week 2016-17dagger 2017-18dagger 2018-19dagger 2019-20dagger 2020-21 2020-21 MN BaselineDagger
40 143 128562 242367 066 13 28
41 143 171591 233836 087 106 28
42 142 139559 221124 073 8800 28
43 124 153928 239513 05 28
44 137 224719 240882 055 28
45 142 175836 227738 07 28
46 164 184595 243498 065 28
47 166 220573 272668 05 28
48 147 208246 405946 042 28
49 215 189865 352987 033 28
50 23 267372 353594 025 28
51 294 258014 565083 014 28
52 364 340117 971059 012 28
53 423 327022 37 024 28
1 506 474847 36 017 28
2 581 321409 33 018 28
3 632 379504 39 028 28
4 646 377994 48 046 28
5 673 325786 54 023 28
6 569 34634 64 03 28
7 533 372245 52 027 28
8 447 33982 54 035 28
9 376 359236 52 027 28
10 298 356018 44 043 28
11 239 303359 36 033 28
12 233 228605 23 035 28
13 166 241452 22 036 28
14 209 22887 16 042 28
15 218 214939 13 042 28
16 165 245684 15 047 28
17 176 215866 16 045 28
18 168 18928 19 043 28
19 14 231566 1 068 28
20
0
2
4
6
8
10
12
40 41 42 43 44 45 46 47 48 49 50 51 52 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Perc
ent w
ith In
fluen
za-li
ke Il
lnes
s
MMWR Week
2017-18
2018-19
2019-20
2020-21
2021-22
Pre-pandemic MN Baselinedagger
Current week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 7
Sentinel Provider Surveillance (Outpatients)
MDH collaborates with healthcare providers who report the total number of patients seen and the total number of those patients presenting to outpatient clinics with influenza-like illness
Percentage of Persons Presenting to Outpatient Clinics with Influenza-Like Illness (ILI)
of outpatients with ILI this week of outpatients with ILI last week
09 11
Indicates current week-data may be delayed by 1 or more weeks dagger The Week 53 value for these seasons is the average of Week 52 and Week 1Dagger MN Baseline valid for 2020-21 season only do not compare it with previous seasons The baseline is
calculated by averaging the ILI percent for non-influenza weeks over the previous four seasons and adding two standard deviations Non-influenza weeks account for less than 2 of the seasonrsquos total flu-positive specimens tested at Public Health Labs in HHS Region 5 Weeks where ILI is above baseline reflect weeks with excess health care visits due to ILI
Week A (H1N1) pdm09 A H3 A (not subtyped) B 2016-17 + by PCR 2017-18 + by PCR 2018-19 + by PCR 2019-20 + by PCR 2020-21 + by PCR
40 3 1 025 0 013175 0 013
41 1 2 019 0123 034247 06 01
42 0 1 0 1 129 0898 095238 03 0108
43 078 06924 202899 0
44 174 1139 137112 02
45 351 03525 332577 0
46 482 034404 331263 01
47 633 047733 859206 01
48 61 10506 992443 0
49 557 06435 116883 01
50 1063 200222 173616 003
51 2219 38961 25333 01
52 2662 6875 287995 01
53 2373 689858 247537 0
1 2608 8645 238247 009
2 3128 11334 291924 0
3 2973 15812 285285 016
4 256 198343 313398 006
5 2463 219485 330324 0
6 2433 257567 359588 0065
7 229 260141 341712 0073
8 2105 255621 354538 0
9 1938 267438 277136 018
10 1745 239014 22092 0
11 1801 224066 928172 012
12 1689 1891 510657 0
13 1711 192825 105079 0
14 1463 105078 0 0045
15 1132 887902 0 0
16 144 743062 0 0
17 1196 554455 0 0
18 529 481348 0 0
19 538 441176 0
0
0
5
10
15
20
25
30
35
40
45
50
0
5
10
15
20
25
30
40 41 42 43 44 45 46 47 48 49 50 51 52 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Percent of Positive Molecular TestsN
umbe
r of P
ositi
ve M
olec
ular
Tes
ts
MMWR Week
B
A (not subtyped)
A H3
A (H1N1) pdm09
2017-18 + by PCR
2018-19 + by PCR
2019-20 + by PCR
2020-21 + by PCR
2021-22 + by PCR
Current week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 8
Laboratory Surveillance
The MN Lab System (MLS) Laboratory Influenza Surveillance Program is made up of more than 310 clinic- and hospital-based laboratories voluntarily submitting testing data weekly These laboratories perform rapid testing for influenza and Respiratory Syncytial Virus (RSV) Significantly fewer labs perform PCR testing for influenza and three also perform PCR testing for other respiratory viruses MDH-PHL provides further characterization of submitted influenza isolates to determine the hemagglutinin serotype to indicate vaccine coverage Tracking the laboratory results assists healthcare providers with patient diagnosis of influenza-like illness and provides an indicator of the progression of the influenza season as well as prevalence of disease in the community
Specimens Positive for Influenza by Molecular Testing by Week
of molecular tests positive this week of molecular tests positive last week
01 01
Beginning in 2016-17 laboratories report results for rapid molecular influenza tests in addition to RT-PCR results
dagger The Week 53 value for these seasons is the average of Week 52 and Week 1
Region AB+ A+ B+ dagger2015-16 + dagger2016-17 + dagger2017-18 + dagger2018-19 + dagger2019-20 + 2020-21 +
40 0 0 0 203 036 1145 103448 0 0
41 0 1 2 072 22 0715 232558 4 23
42 0 1 4 170 203 2916 221239 18 27
43 524 187 16344 18 12
44 196 172 2489 316742 11
45 192 347 08658 468948 32
46 240 485 315501 601589 07
47 460 734 332 95373 34
48 600 113 2247 127993 21
49 501 1109 199336 152819 31
50 788 1562 260869 237288 18
51 934 2187 405872 284537 0
52 1325 3006 919143 311344 18
53 12675 28255 8677865 2940235 265
1 1210 2645 81643 276703 081
2 1338 2899 134066 262082 22
3 1865 3389 167612 312544 0
4 2269 3316 227335 330813 0
5 2427 3239 254458 359291 28
6 2696 271 249393 360528 0
7 3081 2975 28238 368231 574
8 2756 2987 287495 342097 221
9 2689 2712 297446 350487 233
10 2990 2243 315927 309389 0
11 3028 2194 338757 226124 079
12 3082 1891 281729 136591 109
13 2704 1984 253886 407303 159
14 2369 1648 224849 188442 408
15 2180 1771 21995 219178 122
16 1810 172 149654 134771 0
17 1074 1679 149688 104167 175
18 900 148 14718 181818 159
19 980 983 137681 714
20 775 886 133891 0
Region Number + dagger2016-17 + dagger2017-18 + dagger2018-19 + dagger2019-20 + 2020-21+
40 56 1304 1489 810811 91 21
41 106 10 1327 625 10 36
42 72 65 7 493827 158 348
43 96 6767 123711 13
44 93 20408 208333 33
45 91 12381 894309 0
46 25 196429 155844 0
47 241 2227 281633 0
48 2949 29787 237013 77
49 2601 364 26378 0
50 3205 372881 251724 0
51 4051 350133 26824 59
52 3767 324009 291747 0
53 3581 358621 319404 714
1 313 37844 245742 0
2 3291 320833 262443 0
3 3006 320366 201729 105
4 3211 255937 228261 0
5 3043 304094 235474 0
6 2667 29683 190736 0
7 3041 206997 211144 435
8 2248 183871 169675 0
9 2283 214925 142857 0
10 2627 1512 881543 0
11 873 1666667 102881 0
12 1186 179916 48346 0
13 1603 115555 205882 0
14 909 903226 204082 333
15 583 958904 30303 0
16 735 34247 263158 769
17 411 84033 181818 0
18 8 289855 0
19 15 322581 454
20 1 57 15 322581 454
0
5
10
15
20
25
30
35
40
45
50
0
2
4
6
8
10
12
14
16
18
20
40 42 44 46 48 50 52 1 3 5 7 9 11 13 15 17 19
Percentage of Rapid Antigen Influenza Tests Positive
Num
ber o
f Pos
itive
Influ
enza
Spe
cim
ens
MMWR Week
AB+ A+B+ 2016-17 +2017-18 + 2018-19 +2019-20 + 2020-21 +
Current week
0
10
20
30
40
50
60
70
80
90
100
0
25
50
75
100
125
150
175
200
225
250
275
300
40 42 44 46 48 50 52 2 4 6 8 10 12 14 16 18 20
Percentage of Rapid Antigen RSV Tests Positive
Num
ber o
f Pos
itive
RSV
Tes
ts
MMWR Week
Number +
2017-18 +
2018-19 +
2019-20 +
2020-21+
2021-22+
Current week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 9
Laboratory Surveillance (continued)MLS Laboratories ndash Influenza Testing
Specimens Positive by Influenza Rapid Antigen Test by WeekMLS Laboratories ndash RSV Testing
Specimens Positive by RSV Rapid Antigen Test by Week
Region rapid antigen influenza tests + this week
Central 1
Metro 3
Northeast 0
Northwest 0
South Central 6
Southeast 0
Southwest 0
West Central 0
Statewide (overall) 3
Region rapid antigen RSV tests + this week
Central 30
Metro 25
Northeast 0
Northwest 33
South Central 49
Southeast 37
Southwest 35
West Central 35
Statewide (overall) 35dagger The Week 53 value for these seasons is the average of Week 52 and Week 1
Week COVID-positive Flu-positive RSV-positive Other-pathogen positive All tests negative
40 0 0 5 9 28
41 5 0 0 0 17
42 2 0 0 0 13
43
44
45
46
47
48
49
50
51
52
53
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
0
10
20
30
40
50
60
40 41 42 43 44 45 46 47 48 49 50 51 52 53 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Num
ber P
ositi
ve b
y RT
-PCR
MMWR Week
COVID-positive Flu-positive RSV-positive Other-pathogen positive All tests negative
Current week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 10
Minnesota Influenza Incidence Surveillance Project (MIISP)
MIISP surveillance sites collect 10-20 specimens every week on patients presenting with acute respiratory illness with or without fever The graph below illustrate the number of positive results by virus family detected each week The primary purpose of these graphs is to visualize the respiratory viruses circulating in Minnesota
MIISP Testing (Outpatient) by Week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 11
Minnesota Influenza Incidence Surveillance Project (continued)
Pathogen Group Pathogen Frequency Percent of detections
All Negative None 58
Adenovirus Adenovirus 1 5
Bocavirus Bocavirus - -
Influenza Flu AH12009 - -
Flu AH1seasonal - -
Flu AH3 - -
Flu AUnknown - -
Flu AUnsubtypeable - -
Flu B - -
Parainfluenza Parainfluenza-1 - -
Parainfluenza-2 - -
Parainfluenza-3 - -
Parainfluenza-4 - -
RSVMetapneumovirus Metapneumovirus - -
RSV 5 24
Seasonal Coronavirus Coronavirus-229E - -
Coronavirus-HKU1 - -
Coronavirus-NL63 - -
Coronavirus-OC43 - -
RhinovirusEnterovirus Enterovirus - -
Rhinovirus - -
RhinovirusEnterovirus (non-differentiated) 8 38
SARS-CoV-2 (COVID-19) SARS-CoV-2 7 33
This table details the specific viruses detected during the 2020-21 Influenza season Viruses are grouped by the virus family they belong to with the exception of SARS-CoV-2 (the virus that causes COVID-19) which is singled out from the seasonal coronaviruses that regularly circulate throughout the year
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 12
Weekly US Influenza Surveillance Report
Week 41 ending Oct 16 2021Seasonal influenza activity in the United States remains lowbull An annual flu vaccine is the best way to protect against flu and its potentially serious complicationsbull CDC recommends everyone 6 months or older get a flu vaccine by the end of Octoberbull There also are flu antiviral drugs that can be used to treat flu illness
Outpatient Illness ILINet Activity Map
This week 2 jurisdictions experienced moderate activity and no jurisdictions experienced high or very high activity
CDC National Influenza Surveillance (httpwwwcdcgovfluweekly)
- Hospitalized Influenza Surveillance
- Influenza-Associated Death Surveillance
- Respiratory Disease Outbreak Surveillance School Outbreaks
- Respiratory Disease Outbreak Surveillance LTC Outbreaks
- Sentinel Provider Surveillance (Outpatients)
- Laboratory Surveillance
- Minnesota Influenza Incidence Surveillance Project (MIISP)
- Weekly US Influenza Surveillance Report
-
Week B (no genotype) B (Yamagata) B (Victoria) A (not subtyped) A H3 A H1 (unspecified) A (H1N1)pdm09 A (H1N2v) A (H3N2v) AampB Unknown
1
1
Week 2015-16 2016-17 2017-18 2018-19 2019-20 2020-21
3 4 0 3 2 0 1
5 1 4 4 5 1 0
1 2 6 11 6 1 1
3 4 10 8 8 1
4 4 7 5 7 1
4 2 13 7 14 2
3 6 20 2 24 3
2 7 43 7 30 5
2 10 54 10 54 1
3 10 87 13 49 1
8 14 123 9 67 0
9 25 246 18 115 0
11 61 557 51 197 2
8 65 631 52 254 2
10 68 584 55 193 1
11 123 664 51 213 4
20 178 594 100 245 0
32 222 479 139 236 5
48 260 430 132 372 1
98 371 393 159 380 1
162 390 359 228 461 0
213 265 242 197 430 1
263 248 166 260 377 1
191 251 140 234 248 0
105 264 106 193 104 0
119 295 106 189 35 0
59 207 123 140 8 1
59 152 91 92 5 0
37 83 53 51 3 0
19 45 45 56 2 0
13 25 42 28 0 0
7 23 19 28 2 0
6 10 9 11 0 0
0
0
5
10
15
20
25
30
35
40
45
50
40 42 44 46 48 50 52 1 3 5 7 9 11 13 15 17 19
Num
ber o
f Hos
pita
lizat
ions
MMWR Week
B (no genotype)
B (Yamagata)
B (Victoria)
A (not subtyped)
A H3
A H1 (unspecified)
A (H1N1)pdm09
A (H1N2v)
A (H3N2v)
AampB
Unknown
050
100150200250300350400450500550600650700
40 42 44 46 48 50 52 1 3 5 7 9 11 13 15 17 19
Num
ber o
f Hos
pita
lizat
ions
MMWR Week
2016-17
2017-18
2018-19
2019-20
2020-21
2021-22
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 2
Hospitalized Influenza Surveillance
Hospitalized influenza cases are based on disease reports of laboratory-positive influenza (via DFA IFA viral culture EIA rapid test paired serological tests or RT-PCR) and specimens from hospitalized patients with acute respiratory illness submitted to MDH-PHL by hospitals and laboratories Due to the need to confirm reports and reporting delays consider current week data preliminary
Hospitalized Influenza Cases by Type Minnesota (FluSurv-NET)
Hospitalizations this week Hospitalizations last week Total hospitalizations (to date)
1 0 2
Hospitalized Influenza Cases by Season Minnesota (FluSurv-NET)
Season Total hospitalizations (historic)
2016-2017 3695
2017-2018 6446
2018-2019 2543
2019-2020 4022
2020-2021 35
2021-2022 2 (to date)FluSurv-NET = Influenza Surveillance Network
Region of hospitalizations Incidence (cases) per 100000 Persons
Central 0 000
Metro 1 003
Northeast 0 000
Northwest 0 000
South Central 0 000
Southeast 0 000
Southwest 1 047
West Central 0 000
Total 2 004
Age of hospitalizations Incidence (cases) per 100000 Persons
0-4 0 000
5-24 0 000
25-49 0 000
50-64 0 000
65+ 2 021
Case Total 2 004
00 00 00 00 00 00
05
0000
10
20
30
40
50
0
5
10
15
20
25
30
35
40
45
50
Cent
ral
Met
ro
Nor
thea
st
Nor
thw
est
Sout
h Ce
ntra
l
Sout
heas
t
Sout
hwes
t
Wes
t Cen
tral
Hospitalizations per 100000 Persons
Num
ber o
f Hos
pita
lizat
ions
Region
of hospitalizations
Incidence (cases) per 100000 Persons
October 3 2021 ndash October 23 2021
00 00 00 00 02
00
10
20
30
40
50
0
5
10
15
20
25
30
35
40
45
50
0-4 5-24 25-49 50-64 65+
Hospitalizations per 100000 Persons
Num
ber o
f Hos
pita
lizat
ions
Age Group (years)
of hospitalizations
Incidence (cases) per 100000 Persons
October 3 2021 ndash October 23 2021
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 3
Hospitalized Influenza Surveillance (continued)Number of Influenza Hospitalizations and Incidence by Region
Minnesota
Median age (years) at time of admission
810
Number of Influenza Hospitalizations and Incidence by Age Minnesota
Region Hospitalizations this week
Total (to date)
Central 0 (0) 0 (0)
Metro 1 (100) 1 (50)
Northeast 0 (0) 0 (0)
Northwest 0 (0) 0 (0)
South Central 0 (0) 0 (0)
Southeast 0 (0) 0 (0)
Southwest 0 (0) 1 (50)
West Central 0 (0) 0 (0)
Week 2015-16 2016-17 2017-18 2018-19 2019-20 2020-21
40 0 0 1 0 0 0
41 0 0 0 0 0 0
42 0 0 0 0 0 0
43 0 0 0 1 0
44 0 1 0 0 0
45 0 2 0 0 1
46 0 1 0 1 0
47 1 2 0 0 0
48 0 1 1 1 0
49 2 2 1 1 0
50 2 9 0 3 0
51 1 12 3 2 0
52 1 12 2 3 0
1 2 31 1 8 3
2 2 49 1 10 1
3 7 35 3 4 0
4 6 48 3 5 1
5 7 32 4 8 1
6 16 36 3 7 0
7 26 30 8 9 0
8 28 27 8 13 0
9 21 25 2 21 0
10 22 12 13 16 0
11 28 16 10 15 0
12 24 7 12 11 0
13 13 11 3 5 0
14 19 10 6 4 0
15 16 9 4 3 0
16 12 5 2 0 0
17 6 4 1 0 0
18 4 2 2 1 0
19 4 2 1 1 0
20 0 2 0 0 0
3 0 0
Week 2015-16 2016-17 2017-18 2018-19 2019-20 2020-21
0-17 2 6 1 3 0 0
18-49 10 10 9 15 2 0
50-64 20 37 16 31 1 0
65-79 60 101 33 51 1 0
80+ 181 281 36 53 3 0
0
5
10
15
20
25
30
35
40
45
50
40 42 44 46 48 50 52 1 3 5 7 9 11 13 15 17 19
Num
ber o
f Dea
ths
MMWR Week of Death
2016-17
2017-18
2018-19
2019-20
2020-21
2021-22
0
50
100
150
200
250
300
0-17 18-49 50-64 65-79 80+N
umbe
r of D
eath
sAge Group (years)
2016-17 2017-18 2018-19 2019-20 2020-21 2021-22
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 4
Influenza-Associated Death Surveillance
Influenza deaths are collected via reports from Minnesotarsquos death certificate database hospitals and long-term care facilities Decedents with influenza listed as a cause of or contributor to death have recent laboratory confirmation of influenza or are part of an ongoing influenza outbreak at a long-term care facility are reported to influenza surveillance Due to the need to confirm reports and reporting delays consider current week data preliminary
Deaths Associated with Influenza by Season Minnesota
Deaths Associated with Influenza by Age Group and Season Minnesota
Season Median age (years) at time of death
2016-2017 86
2017-2018 85
2018-2019 75
2019-2020 73
2020-2021 76
2021-2022 ---FluSurv-NET = Influenza Surveillance Network
Season Total deaths (historic) Total pediatric (lt18 years) deaths (historic)
2016-2017 273 2
2017-2018 440 6
2018-2019 126 1
2019-2020 197 3
2020-2021 7 0
2021-2022 0 0
Week 2016-17dagger 2017-18dagger 2018-19dagger 2019-20dagger 2020-21
40 0 1 1 0 8
41 2 1 3 0 8
42 1 0 1 1 1
43 0 0 4 0
44 2 2 0 0
45 1 4 4 1
46 3 0 7 1
47 2 1 19 0
48 1 1 7 0
49 5 5 14 0
50 19 5 61 0
51 3 6 172 0
52 3 0 5 0
53 5 0 9 0
1 73 12 32 0
2 122 38 121 0
3 77 31 79 0
4 103 8 91 0
5 109 16 79 0
6 66 38 66 0
7 22 30 35 0
8 23 22 44 1
9 4 43 22 0
10 16 33 25 0
11 7 26 2 0
12 3 15 0 0
13 4 12 0 0
14 8 10 0 0
15 8 2 0 0
16 0 5 0 0
17 1 6 0 0
18 3 6 0 0
19 0 4 0 1
20
0
50
100
150
200
40 41 42 43 44 45 46 47 48 49 50 51 52 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Num
ber o
f Inf
luen
za-li
ke Il
lnes
s Out
brea
ks
MMWR Week
2017-18
2018-19
2019-20
2020-21
2021-22
Current week
Note 61 outbreaks were reported pre-season during weeks 37-39
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 5
Respiratory Disease Outbreak Surveillance School Outbreaks
K-12 schools report an outbreak of influenza-like illness (ILI) when the number of students absent with ILI reaches 5 of total enrollment or three or more students with ILI are absent from the same elementary classroom
Influenza-like Illness (ILI) in Schools by Season
New school outbreaks this week New school outbreaks last week Total this season (to date)1 8 17dagger The Week 53 value for these seasons is the average of Week 52 and Week 1
Week 2016-17dagger 2017-18dagger 2018-19dagger 2019-20dagger 2020-21
0 0 0 0 0 1
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
1 0 0 2 1
0 1 1 0 0
1 0 0 1 0
0 5 0 1 1
1 3 0 2 0
2 3 0 0 0
1 1 0 2 0
2 18 1 0 0
3 23 0 6 1
3 36 0 6 0
6 24 2 4 0
9 10 2 7 0
11 13 6 9 0
12 13 5 7 0
11 10 3 6 1
21 13 4 19 0
14 8 6 10 1
12 3 5 11 0
11 4 7 8 0
11 9 4 4 0
7 4 3 0 0
10 6 2 0 0
12 1 0 1 0
6 0 2 0 0
7 0 2 0 0
1 1 2 0 0
3 2 1 0
3 0 1 0
2
0
5
10
15
20
25
30
35
40
40 41 42 43 44 45 46 47 48 49 50 51 52 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Num
ber o
f lab
-con
firm
ed o
utbr
eaks
MMWR Week
2017-18
2018-19
2019-20
2020-21
2021-22
Current week
Note 1 outbreak was reported pre-season during weeks 39
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 6
Respiratory Disease Outbreak Surveillance LTC OutbreaksLong-Term Care (LTC) facilities report to MDH when they suspect an outbreak of influenza in their facility Laboratory-confirmed outbreaks are reported here
Confirmed Influenza Outbreaks in LTC by Season
dagger The Week 53 value for these seasons is the average of Week 52 and Week 1
New LTC outbreacksI this week New LTCoutbreaks last week Total this season (to date)0 0 1
Week 2016-17dagger 2017-18dagger 2018-19dagger 2019-20dagger 2020-21 2020-21 MN BaselineDagger
40 143 128562 242367 066 13 28
41 143 171591 233836 087 106 28
42 142 139559 221124 073 8800 28
43 124 153928 239513 05 28
44 137 224719 240882 055 28
45 142 175836 227738 07 28
46 164 184595 243498 065 28
47 166 220573 272668 05 28
48 147 208246 405946 042 28
49 215 189865 352987 033 28
50 23 267372 353594 025 28
51 294 258014 565083 014 28
52 364 340117 971059 012 28
53 423 327022 37 024 28
1 506 474847 36 017 28
2 581 321409 33 018 28
3 632 379504 39 028 28
4 646 377994 48 046 28
5 673 325786 54 023 28
6 569 34634 64 03 28
7 533 372245 52 027 28
8 447 33982 54 035 28
9 376 359236 52 027 28
10 298 356018 44 043 28
11 239 303359 36 033 28
12 233 228605 23 035 28
13 166 241452 22 036 28
14 209 22887 16 042 28
15 218 214939 13 042 28
16 165 245684 15 047 28
17 176 215866 16 045 28
18 168 18928 19 043 28
19 14 231566 1 068 28
20
0
2
4
6
8
10
12
40 41 42 43 44 45 46 47 48 49 50 51 52 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Perc
ent w
ith In
fluen
za-li
ke Il
lnes
s
MMWR Week
2017-18
2018-19
2019-20
2020-21
2021-22
Pre-pandemic MN Baselinedagger
Current week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 7
Sentinel Provider Surveillance (Outpatients)
MDH collaborates with healthcare providers who report the total number of patients seen and the total number of those patients presenting to outpatient clinics with influenza-like illness
Percentage of Persons Presenting to Outpatient Clinics with Influenza-Like Illness (ILI)
of outpatients with ILI this week of outpatients with ILI last week
09 11
Indicates current week-data may be delayed by 1 or more weeks dagger The Week 53 value for these seasons is the average of Week 52 and Week 1Dagger MN Baseline valid for 2020-21 season only do not compare it with previous seasons The baseline is
calculated by averaging the ILI percent for non-influenza weeks over the previous four seasons and adding two standard deviations Non-influenza weeks account for less than 2 of the seasonrsquos total flu-positive specimens tested at Public Health Labs in HHS Region 5 Weeks where ILI is above baseline reflect weeks with excess health care visits due to ILI
Week A (H1N1) pdm09 A H3 A (not subtyped) B 2016-17 + by PCR 2017-18 + by PCR 2018-19 + by PCR 2019-20 + by PCR 2020-21 + by PCR
40 3 1 025 0 013175 0 013
41 1 2 019 0123 034247 06 01
42 0 1 0 1 129 0898 095238 03 0108
43 078 06924 202899 0
44 174 1139 137112 02
45 351 03525 332577 0
46 482 034404 331263 01
47 633 047733 859206 01
48 61 10506 992443 0
49 557 06435 116883 01
50 1063 200222 173616 003
51 2219 38961 25333 01
52 2662 6875 287995 01
53 2373 689858 247537 0
1 2608 8645 238247 009
2 3128 11334 291924 0
3 2973 15812 285285 016
4 256 198343 313398 006
5 2463 219485 330324 0
6 2433 257567 359588 0065
7 229 260141 341712 0073
8 2105 255621 354538 0
9 1938 267438 277136 018
10 1745 239014 22092 0
11 1801 224066 928172 012
12 1689 1891 510657 0
13 1711 192825 105079 0
14 1463 105078 0 0045
15 1132 887902 0 0
16 144 743062 0 0
17 1196 554455 0 0
18 529 481348 0 0
19 538 441176 0
0
0
5
10
15
20
25
30
35
40
45
50
0
5
10
15
20
25
30
40 41 42 43 44 45 46 47 48 49 50 51 52 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Percent of Positive Molecular TestsN
umbe
r of P
ositi
ve M
olec
ular
Tes
ts
MMWR Week
B
A (not subtyped)
A H3
A (H1N1) pdm09
2017-18 + by PCR
2018-19 + by PCR
2019-20 + by PCR
2020-21 + by PCR
2021-22 + by PCR
Current week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 8
Laboratory Surveillance
The MN Lab System (MLS) Laboratory Influenza Surveillance Program is made up of more than 310 clinic- and hospital-based laboratories voluntarily submitting testing data weekly These laboratories perform rapid testing for influenza and Respiratory Syncytial Virus (RSV) Significantly fewer labs perform PCR testing for influenza and three also perform PCR testing for other respiratory viruses MDH-PHL provides further characterization of submitted influenza isolates to determine the hemagglutinin serotype to indicate vaccine coverage Tracking the laboratory results assists healthcare providers with patient diagnosis of influenza-like illness and provides an indicator of the progression of the influenza season as well as prevalence of disease in the community
Specimens Positive for Influenza by Molecular Testing by Week
of molecular tests positive this week of molecular tests positive last week
01 01
Beginning in 2016-17 laboratories report results for rapid molecular influenza tests in addition to RT-PCR results
dagger The Week 53 value for these seasons is the average of Week 52 and Week 1
Region AB+ A+ B+ dagger2015-16 + dagger2016-17 + dagger2017-18 + dagger2018-19 + dagger2019-20 + 2020-21 +
40 0 0 0 203 036 1145 103448 0 0
41 0 1 2 072 22 0715 232558 4 23
42 0 1 4 170 203 2916 221239 18 27
43 524 187 16344 18 12
44 196 172 2489 316742 11
45 192 347 08658 468948 32
46 240 485 315501 601589 07
47 460 734 332 95373 34
48 600 113 2247 127993 21
49 501 1109 199336 152819 31
50 788 1562 260869 237288 18
51 934 2187 405872 284537 0
52 1325 3006 919143 311344 18
53 12675 28255 8677865 2940235 265
1 1210 2645 81643 276703 081
2 1338 2899 134066 262082 22
3 1865 3389 167612 312544 0
4 2269 3316 227335 330813 0
5 2427 3239 254458 359291 28
6 2696 271 249393 360528 0
7 3081 2975 28238 368231 574
8 2756 2987 287495 342097 221
9 2689 2712 297446 350487 233
10 2990 2243 315927 309389 0
11 3028 2194 338757 226124 079
12 3082 1891 281729 136591 109
13 2704 1984 253886 407303 159
14 2369 1648 224849 188442 408
15 2180 1771 21995 219178 122
16 1810 172 149654 134771 0
17 1074 1679 149688 104167 175
18 900 148 14718 181818 159
19 980 983 137681 714
20 775 886 133891 0
Region Number + dagger2016-17 + dagger2017-18 + dagger2018-19 + dagger2019-20 + 2020-21+
40 56 1304 1489 810811 91 21
41 106 10 1327 625 10 36
42 72 65 7 493827 158 348
43 96 6767 123711 13
44 93 20408 208333 33
45 91 12381 894309 0
46 25 196429 155844 0
47 241 2227 281633 0
48 2949 29787 237013 77
49 2601 364 26378 0
50 3205 372881 251724 0
51 4051 350133 26824 59
52 3767 324009 291747 0
53 3581 358621 319404 714
1 313 37844 245742 0
2 3291 320833 262443 0
3 3006 320366 201729 105
4 3211 255937 228261 0
5 3043 304094 235474 0
6 2667 29683 190736 0
7 3041 206997 211144 435
8 2248 183871 169675 0
9 2283 214925 142857 0
10 2627 1512 881543 0
11 873 1666667 102881 0
12 1186 179916 48346 0
13 1603 115555 205882 0
14 909 903226 204082 333
15 583 958904 30303 0
16 735 34247 263158 769
17 411 84033 181818 0
18 8 289855 0
19 15 322581 454
20 1 57 15 322581 454
0
5
10
15
20
25
30
35
40
45
50
0
2
4
6
8
10
12
14
16
18
20
40 42 44 46 48 50 52 1 3 5 7 9 11 13 15 17 19
Percentage of Rapid Antigen Influenza Tests Positive
Num
ber o
f Pos
itive
Influ
enza
Spe
cim
ens
MMWR Week
AB+ A+B+ 2016-17 +2017-18 + 2018-19 +2019-20 + 2020-21 +
Current week
0
10
20
30
40
50
60
70
80
90
100
0
25
50
75
100
125
150
175
200
225
250
275
300
40 42 44 46 48 50 52 2 4 6 8 10 12 14 16 18 20
Percentage of Rapid Antigen RSV Tests Positive
Num
ber o
f Pos
itive
RSV
Tes
ts
MMWR Week
Number +
2017-18 +
2018-19 +
2019-20 +
2020-21+
2021-22+
Current week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 9
Laboratory Surveillance (continued)MLS Laboratories ndash Influenza Testing
Specimens Positive by Influenza Rapid Antigen Test by WeekMLS Laboratories ndash RSV Testing
Specimens Positive by RSV Rapid Antigen Test by Week
Region rapid antigen influenza tests + this week
Central 1
Metro 3
Northeast 0
Northwest 0
South Central 6
Southeast 0
Southwest 0
West Central 0
Statewide (overall) 3
Region rapid antigen RSV tests + this week
Central 30
Metro 25
Northeast 0
Northwest 33
South Central 49
Southeast 37
Southwest 35
West Central 35
Statewide (overall) 35dagger The Week 53 value for these seasons is the average of Week 52 and Week 1
Week COVID-positive Flu-positive RSV-positive Other-pathogen positive All tests negative
40 0 0 5 9 28
41 5 0 0 0 17
42 2 0 0 0 13
43
44
45
46
47
48
49
50
51
52
53
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
0
10
20
30
40
50
60
40 41 42 43 44 45 46 47 48 49 50 51 52 53 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Num
ber P
ositi
ve b
y RT
-PCR
MMWR Week
COVID-positive Flu-positive RSV-positive Other-pathogen positive All tests negative
Current week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 10
Minnesota Influenza Incidence Surveillance Project (MIISP)
MIISP surveillance sites collect 10-20 specimens every week on patients presenting with acute respiratory illness with or without fever The graph below illustrate the number of positive results by virus family detected each week The primary purpose of these graphs is to visualize the respiratory viruses circulating in Minnesota
MIISP Testing (Outpatient) by Week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 11
Minnesota Influenza Incidence Surveillance Project (continued)
Pathogen Group Pathogen Frequency Percent of detections
All Negative None 58
Adenovirus Adenovirus 1 5
Bocavirus Bocavirus - -
Influenza Flu AH12009 - -
Flu AH1seasonal - -
Flu AH3 - -
Flu AUnknown - -
Flu AUnsubtypeable - -
Flu B - -
Parainfluenza Parainfluenza-1 - -
Parainfluenza-2 - -
Parainfluenza-3 - -
Parainfluenza-4 - -
RSVMetapneumovirus Metapneumovirus - -
RSV 5 24
Seasonal Coronavirus Coronavirus-229E - -
Coronavirus-HKU1 - -
Coronavirus-NL63 - -
Coronavirus-OC43 - -
RhinovirusEnterovirus Enterovirus - -
Rhinovirus - -
RhinovirusEnterovirus (non-differentiated) 8 38
SARS-CoV-2 (COVID-19) SARS-CoV-2 7 33
This table details the specific viruses detected during the 2020-21 Influenza season Viruses are grouped by the virus family they belong to with the exception of SARS-CoV-2 (the virus that causes COVID-19) which is singled out from the seasonal coronaviruses that regularly circulate throughout the year
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 12
Weekly US Influenza Surveillance Report
Week 41 ending Oct 16 2021Seasonal influenza activity in the United States remains lowbull An annual flu vaccine is the best way to protect against flu and its potentially serious complicationsbull CDC recommends everyone 6 months or older get a flu vaccine by the end of Octoberbull There also are flu antiviral drugs that can be used to treat flu illness
Outpatient Illness ILINet Activity Map
This week 2 jurisdictions experienced moderate activity and no jurisdictions experienced high or very high activity
CDC National Influenza Surveillance (httpwwwcdcgovfluweekly)
- Hospitalized Influenza Surveillance
- Influenza-Associated Death Surveillance
- Respiratory Disease Outbreak Surveillance School Outbreaks
- Respiratory Disease Outbreak Surveillance LTC Outbreaks
- Sentinel Provider Surveillance (Outpatients)
- Laboratory Surveillance
- Minnesota Influenza Incidence Surveillance Project (MIISP)
- Weekly US Influenza Surveillance Report
-
Region of hospitalizations Incidence (cases) per 100000 Persons
Central 0 000
Metro 1 003
Northeast 0 000
Northwest 0 000
South Central 0 000
Southeast 0 000
Southwest 1 047
West Central 0 000
Total 2 004
Age of hospitalizations Incidence (cases) per 100000 Persons
0-4 0 000
5-24 0 000
25-49 0 000
50-64 0 000
65+ 2 021
Case Total 2 004
00 00 00 00 00 00
05
0000
10
20
30
40
50
0
5
10
15
20
25
30
35
40
45
50
Cent
ral
Met
ro
Nor
thea
st
Nor
thw
est
Sout
h Ce
ntra
l
Sout
heas
t
Sout
hwes
t
Wes
t Cen
tral
Hospitalizations per 100000 Persons
Num
ber o
f Hos
pita
lizat
ions
Region
of hospitalizations
Incidence (cases) per 100000 Persons
October 3 2021 ndash October 23 2021
00 00 00 00 02
00
10
20
30
40
50
0
5
10
15
20
25
30
35
40
45
50
0-4 5-24 25-49 50-64 65+
Hospitalizations per 100000 Persons
Num
ber o
f Hos
pita
lizat
ions
Age Group (years)
of hospitalizations
Incidence (cases) per 100000 Persons
October 3 2021 ndash October 23 2021
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 3
Hospitalized Influenza Surveillance (continued)Number of Influenza Hospitalizations and Incidence by Region
Minnesota
Median age (years) at time of admission
810
Number of Influenza Hospitalizations and Incidence by Age Minnesota
Region Hospitalizations this week
Total (to date)
Central 0 (0) 0 (0)
Metro 1 (100) 1 (50)
Northeast 0 (0) 0 (0)
Northwest 0 (0) 0 (0)
South Central 0 (0) 0 (0)
Southeast 0 (0) 0 (0)
Southwest 0 (0) 1 (50)
West Central 0 (0) 0 (0)
Week 2015-16 2016-17 2017-18 2018-19 2019-20 2020-21
40 0 0 1 0 0 0
41 0 0 0 0 0 0
42 0 0 0 0 0 0
43 0 0 0 1 0
44 0 1 0 0 0
45 0 2 0 0 1
46 0 1 0 1 0
47 1 2 0 0 0
48 0 1 1 1 0
49 2 2 1 1 0
50 2 9 0 3 0
51 1 12 3 2 0
52 1 12 2 3 0
1 2 31 1 8 3
2 2 49 1 10 1
3 7 35 3 4 0
4 6 48 3 5 1
5 7 32 4 8 1
6 16 36 3 7 0
7 26 30 8 9 0
8 28 27 8 13 0
9 21 25 2 21 0
10 22 12 13 16 0
11 28 16 10 15 0
12 24 7 12 11 0
13 13 11 3 5 0
14 19 10 6 4 0
15 16 9 4 3 0
16 12 5 2 0 0
17 6 4 1 0 0
18 4 2 2 1 0
19 4 2 1 1 0
20 0 2 0 0 0
3 0 0
Week 2015-16 2016-17 2017-18 2018-19 2019-20 2020-21
0-17 2 6 1 3 0 0
18-49 10 10 9 15 2 0
50-64 20 37 16 31 1 0
65-79 60 101 33 51 1 0
80+ 181 281 36 53 3 0
0
5
10
15
20
25
30
35
40
45
50
40 42 44 46 48 50 52 1 3 5 7 9 11 13 15 17 19
Num
ber o
f Dea
ths
MMWR Week of Death
2016-17
2017-18
2018-19
2019-20
2020-21
2021-22
0
50
100
150
200
250
300
0-17 18-49 50-64 65-79 80+N
umbe
r of D
eath
sAge Group (years)
2016-17 2017-18 2018-19 2019-20 2020-21 2021-22
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 4
Influenza-Associated Death Surveillance
Influenza deaths are collected via reports from Minnesotarsquos death certificate database hospitals and long-term care facilities Decedents with influenza listed as a cause of or contributor to death have recent laboratory confirmation of influenza or are part of an ongoing influenza outbreak at a long-term care facility are reported to influenza surveillance Due to the need to confirm reports and reporting delays consider current week data preliminary
Deaths Associated with Influenza by Season Minnesota
Deaths Associated with Influenza by Age Group and Season Minnesota
Season Median age (years) at time of death
2016-2017 86
2017-2018 85
2018-2019 75
2019-2020 73
2020-2021 76
2021-2022 ---FluSurv-NET = Influenza Surveillance Network
Season Total deaths (historic) Total pediatric (lt18 years) deaths (historic)
2016-2017 273 2
2017-2018 440 6
2018-2019 126 1
2019-2020 197 3
2020-2021 7 0
2021-2022 0 0
Week 2016-17dagger 2017-18dagger 2018-19dagger 2019-20dagger 2020-21
40 0 1 1 0 8
41 2 1 3 0 8
42 1 0 1 1 1
43 0 0 4 0
44 2 2 0 0
45 1 4 4 1
46 3 0 7 1
47 2 1 19 0
48 1 1 7 0
49 5 5 14 0
50 19 5 61 0
51 3 6 172 0
52 3 0 5 0
53 5 0 9 0
1 73 12 32 0
2 122 38 121 0
3 77 31 79 0
4 103 8 91 0
5 109 16 79 0
6 66 38 66 0
7 22 30 35 0
8 23 22 44 1
9 4 43 22 0
10 16 33 25 0
11 7 26 2 0
12 3 15 0 0
13 4 12 0 0
14 8 10 0 0
15 8 2 0 0
16 0 5 0 0
17 1 6 0 0
18 3 6 0 0
19 0 4 0 1
20
0
50
100
150
200
40 41 42 43 44 45 46 47 48 49 50 51 52 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Num
ber o
f Inf
luen
za-li
ke Il
lnes
s Out
brea
ks
MMWR Week
2017-18
2018-19
2019-20
2020-21
2021-22
Current week
Note 61 outbreaks were reported pre-season during weeks 37-39
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 5
Respiratory Disease Outbreak Surveillance School Outbreaks
K-12 schools report an outbreak of influenza-like illness (ILI) when the number of students absent with ILI reaches 5 of total enrollment or three or more students with ILI are absent from the same elementary classroom
Influenza-like Illness (ILI) in Schools by Season
New school outbreaks this week New school outbreaks last week Total this season (to date)1 8 17dagger The Week 53 value for these seasons is the average of Week 52 and Week 1
Week 2016-17dagger 2017-18dagger 2018-19dagger 2019-20dagger 2020-21
0 0 0 0 0 1
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
1 0 0 2 1
0 1 1 0 0
1 0 0 1 0
0 5 0 1 1
1 3 0 2 0
2 3 0 0 0
1 1 0 2 0
2 18 1 0 0
3 23 0 6 1
3 36 0 6 0
6 24 2 4 0
9 10 2 7 0
11 13 6 9 0
12 13 5 7 0
11 10 3 6 1
21 13 4 19 0
14 8 6 10 1
12 3 5 11 0
11 4 7 8 0
11 9 4 4 0
7 4 3 0 0
10 6 2 0 0
12 1 0 1 0
6 0 2 0 0
7 0 2 0 0
1 1 2 0 0
3 2 1 0
3 0 1 0
2
0
5
10
15
20
25
30
35
40
40 41 42 43 44 45 46 47 48 49 50 51 52 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Num
ber o
f lab
-con
firm
ed o
utbr
eaks
MMWR Week
2017-18
2018-19
2019-20
2020-21
2021-22
Current week
Note 1 outbreak was reported pre-season during weeks 39
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 6
Respiratory Disease Outbreak Surveillance LTC OutbreaksLong-Term Care (LTC) facilities report to MDH when they suspect an outbreak of influenza in their facility Laboratory-confirmed outbreaks are reported here
Confirmed Influenza Outbreaks in LTC by Season
dagger The Week 53 value for these seasons is the average of Week 52 and Week 1
New LTC outbreacksI this week New LTCoutbreaks last week Total this season (to date)0 0 1
Week 2016-17dagger 2017-18dagger 2018-19dagger 2019-20dagger 2020-21 2020-21 MN BaselineDagger
40 143 128562 242367 066 13 28
41 143 171591 233836 087 106 28
42 142 139559 221124 073 8800 28
43 124 153928 239513 05 28
44 137 224719 240882 055 28
45 142 175836 227738 07 28
46 164 184595 243498 065 28
47 166 220573 272668 05 28
48 147 208246 405946 042 28
49 215 189865 352987 033 28
50 23 267372 353594 025 28
51 294 258014 565083 014 28
52 364 340117 971059 012 28
53 423 327022 37 024 28
1 506 474847 36 017 28
2 581 321409 33 018 28
3 632 379504 39 028 28
4 646 377994 48 046 28
5 673 325786 54 023 28
6 569 34634 64 03 28
7 533 372245 52 027 28
8 447 33982 54 035 28
9 376 359236 52 027 28
10 298 356018 44 043 28
11 239 303359 36 033 28
12 233 228605 23 035 28
13 166 241452 22 036 28
14 209 22887 16 042 28
15 218 214939 13 042 28
16 165 245684 15 047 28
17 176 215866 16 045 28
18 168 18928 19 043 28
19 14 231566 1 068 28
20
0
2
4
6
8
10
12
40 41 42 43 44 45 46 47 48 49 50 51 52 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Perc
ent w
ith In
fluen
za-li
ke Il
lnes
s
MMWR Week
2017-18
2018-19
2019-20
2020-21
2021-22
Pre-pandemic MN Baselinedagger
Current week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 7
Sentinel Provider Surveillance (Outpatients)
MDH collaborates with healthcare providers who report the total number of patients seen and the total number of those patients presenting to outpatient clinics with influenza-like illness
Percentage of Persons Presenting to Outpatient Clinics with Influenza-Like Illness (ILI)
of outpatients with ILI this week of outpatients with ILI last week
09 11
Indicates current week-data may be delayed by 1 or more weeks dagger The Week 53 value for these seasons is the average of Week 52 and Week 1Dagger MN Baseline valid for 2020-21 season only do not compare it with previous seasons The baseline is
calculated by averaging the ILI percent for non-influenza weeks over the previous four seasons and adding two standard deviations Non-influenza weeks account for less than 2 of the seasonrsquos total flu-positive specimens tested at Public Health Labs in HHS Region 5 Weeks where ILI is above baseline reflect weeks with excess health care visits due to ILI
Week A (H1N1) pdm09 A H3 A (not subtyped) B 2016-17 + by PCR 2017-18 + by PCR 2018-19 + by PCR 2019-20 + by PCR 2020-21 + by PCR
40 3 1 025 0 013175 0 013
41 1 2 019 0123 034247 06 01
42 0 1 0 1 129 0898 095238 03 0108
43 078 06924 202899 0
44 174 1139 137112 02
45 351 03525 332577 0
46 482 034404 331263 01
47 633 047733 859206 01
48 61 10506 992443 0
49 557 06435 116883 01
50 1063 200222 173616 003
51 2219 38961 25333 01
52 2662 6875 287995 01
53 2373 689858 247537 0
1 2608 8645 238247 009
2 3128 11334 291924 0
3 2973 15812 285285 016
4 256 198343 313398 006
5 2463 219485 330324 0
6 2433 257567 359588 0065
7 229 260141 341712 0073
8 2105 255621 354538 0
9 1938 267438 277136 018
10 1745 239014 22092 0
11 1801 224066 928172 012
12 1689 1891 510657 0
13 1711 192825 105079 0
14 1463 105078 0 0045
15 1132 887902 0 0
16 144 743062 0 0
17 1196 554455 0 0
18 529 481348 0 0
19 538 441176 0
0
0
5
10
15
20
25
30
35
40
45
50
0
5
10
15
20
25
30
40 41 42 43 44 45 46 47 48 49 50 51 52 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Percent of Positive Molecular TestsN
umbe
r of P
ositi
ve M
olec
ular
Tes
ts
MMWR Week
B
A (not subtyped)
A H3
A (H1N1) pdm09
2017-18 + by PCR
2018-19 + by PCR
2019-20 + by PCR
2020-21 + by PCR
2021-22 + by PCR
Current week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 8
Laboratory Surveillance
The MN Lab System (MLS) Laboratory Influenza Surveillance Program is made up of more than 310 clinic- and hospital-based laboratories voluntarily submitting testing data weekly These laboratories perform rapid testing for influenza and Respiratory Syncytial Virus (RSV) Significantly fewer labs perform PCR testing for influenza and three also perform PCR testing for other respiratory viruses MDH-PHL provides further characterization of submitted influenza isolates to determine the hemagglutinin serotype to indicate vaccine coverage Tracking the laboratory results assists healthcare providers with patient diagnosis of influenza-like illness and provides an indicator of the progression of the influenza season as well as prevalence of disease in the community
Specimens Positive for Influenza by Molecular Testing by Week
of molecular tests positive this week of molecular tests positive last week
01 01
Beginning in 2016-17 laboratories report results for rapid molecular influenza tests in addition to RT-PCR results
dagger The Week 53 value for these seasons is the average of Week 52 and Week 1
Region AB+ A+ B+ dagger2015-16 + dagger2016-17 + dagger2017-18 + dagger2018-19 + dagger2019-20 + 2020-21 +
40 0 0 0 203 036 1145 103448 0 0
41 0 1 2 072 22 0715 232558 4 23
42 0 1 4 170 203 2916 221239 18 27
43 524 187 16344 18 12
44 196 172 2489 316742 11
45 192 347 08658 468948 32
46 240 485 315501 601589 07
47 460 734 332 95373 34
48 600 113 2247 127993 21
49 501 1109 199336 152819 31
50 788 1562 260869 237288 18
51 934 2187 405872 284537 0
52 1325 3006 919143 311344 18
53 12675 28255 8677865 2940235 265
1 1210 2645 81643 276703 081
2 1338 2899 134066 262082 22
3 1865 3389 167612 312544 0
4 2269 3316 227335 330813 0
5 2427 3239 254458 359291 28
6 2696 271 249393 360528 0
7 3081 2975 28238 368231 574
8 2756 2987 287495 342097 221
9 2689 2712 297446 350487 233
10 2990 2243 315927 309389 0
11 3028 2194 338757 226124 079
12 3082 1891 281729 136591 109
13 2704 1984 253886 407303 159
14 2369 1648 224849 188442 408
15 2180 1771 21995 219178 122
16 1810 172 149654 134771 0
17 1074 1679 149688 104167 175
18 900 148 14718 181818 159
19 980 983 137681 714
20 775 886 133891 0
Region Number + dagger2016-17 + dagger2017-18 + dagger2018-19 + dagger2019-20 + 2020-21+
40 56 1304 1489 810811 91 21
41 106 10 1327 625 10 36
42 72 65 7 493827 158 348
43 96 6767 123711 13
44 93 20408 208333 33
45 91 12381 894309 0
46 25 196429 155844 0
47 241 2227 281633 0
48 2949 29787 237013 77
49 2601 364 26378 0
50 3205 372881 251724 0
51 4051 350133 26824 59
52 3767 324009 291747 0
53 3581 358621 319404 714
1 313 37844 245742 0
2 3291 320833 262443 0
3 3006 320366 201729 105
4 3211 255937 228261 0
5 3043 304094 235474 0
6 2667 29683 190736 0
7 3041 206997 211144 435
8 2248 183871 169675 0
9 2283 214925 142857 0
10 2627 1512 881543 0
11 873 1666667 102881 0
12 1186 179916 48346 0
13 1603 115555 205882 0
14 909 903226 204082 333
15 583 958904 30303 0
16 735 34247 263158 769
17 411 84033 181818 0
18 8 289855 0
19 15 322581 454
20 1 57 15 322581 454
0
5
10
15
20
25
30
35
40
45
50
0
2
4
6
8
10
12
14
16
18
20
40 42 44 46 48 50 52 1 3 5 7 9 11 13 15 17 19
Percentage of Rapid Antigen Influenza Tests Positive
Num
ber o
f Pos
itive
Influ
enza
Spe
cim
ens
MMWR Week
AB+ A+B+ 2016-17 +2017-18 + 2018-19 +2019-20 + 2020-21 +
Current week
0
10
20
30
40
50
60
70
80
90
100
0
25
50
75
100
125
150
175
200
225
250
275
300
40 42 44 46 48 50 52 2 4 6 8 10 12 14 16 18 20
Percentage of Rapid Antigen RSV Tests Positive
Num
ber o
f Pos
itive
RSV
Tes
ts
MMWR Week
Number +
2017-18 +
2018-19 +
2019-20 +
2020-21+
2021-22+
Current week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 9
Laboratory Surveillance (continued)MLS Laboratories ndash Influenza Testing
Specimens Positive by Influenza Rapid Antigen Test by WeekMLS Laboratories ndash RSV Testing
Specimens Positive by RSV Rapid Antigen Test by Week
Region rapid antigen influenza tests + this week
Central 1
Metro 3
Northeast 0
Northwest 0
South Central 6
Southeast 0
Southwest 0
West Central 0
Statewide (overall) 3
Region rapid antigen RSV tests + this week
Central 30
Metro 25
Northeast 0
Northwest 33
South Central 49
Southeast 37
Southwest 35
West Central 35
Statewide (overall) 35dagger The Week 53 value for these seasons is the average of Week 52 and Week 1
Week COVID-positive Flu-positive RSV-positive Other-pathogen positive All tests negative
40 0 0 5 9 28
41 5 0 0 0 17
42 2 0 0 0 13
43
44
45
46
47
48
49
50
51
52
53
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
0
10
20
30
40
50
60
40 41 42 43 44 45 46 47 48 49 50 51 52 53 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Num
ber P
ositi
ve b
y RT
-PCR
MMWR Week
COVID-positive Flu-positive RSV-positive Other-pathogen positive All tests negative
Current week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 10
Minnesota Influenza Incidence Surveillance Project (MIISP)
MIISP surveillance sites collect 10-20 specimens every week on patients presenting with acute respiratory illness with or without fever The graph below illustrate the number of positive results by virus family detected each week The primary purpose of these graphs is to visualize the respiratory viruses circulating in Minnesota
MIISP Testing (Outpatient) by Week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 11
Minnesota Influenza Incidence Surveillance Project (continued)
Pathogen Group Pathogen Frequency Percent of detections
All Negative None 58
Adenovirus Adenovirus 1 5
Bocavirus Bocavirus - -
Influenza Flu AH12009 - -
Flu AH1seasonal - -
Flu AH3 - -
Flu AUnknown - -
Flu AUnsubtypeable - -
Flu B - -
Parainfluenza Parainfluenza-1 - -
Parainfluenza-2 - -
Parainfluenza-3 - -
Parainfluenza-4 - -
RSVMetapneumovirus Metapneumovirus - -
RSV 5 24
Seasonal Coronavirus Coronavirus-229E - -
Coronavirus-HKU1 - -
Coronavirus-NL63 - -
Coronavirus-OC43 - -
RhinovirusEnterovirus Enterovirus - -
Rhinovirus - -
RhinovirusEnterovirus (non-differentiated) 8 38
SARS-CoV-2 (COVID-19) SARS-CoV-2 7 33
This table details the specific viruses detected during the 2020-21 Influenza season Viruses are grouped by the virus family they belong to with the exception of SARS-CoV-2 (the virus that causes COVID-19) which is singled out from the seasonal coronaviruses that regularly circulate throughout the year
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 12
Weekly US Influenza Surveillance Report
Week 41 ending Oct 16 2021Seasonal influenza activity in the United States remains lowbull An annual flu vaccine is the best way to protect against flu and its potentially serious complicationsbull CDC recommends everyone 6 months or older get a flu vaccine by the end of Octoberbull There also are flu antiviral drugs that can be used to treat flu illness
Outpatient Illness ILINet Activity Map
This week 2 jurisdictions experienced moderate activity and no jurisdictions experienced high or very high activity
CDC National Influenza Surveillance (httpwwwcdcgovfluweekly)
- Hospitalized Influenza Surveillance
- Influenza-Associated Death Surveillance
- Respiratory Disease Outbreak Surveillance School Outbreaks
- Respiratory Disease Outbreak Surveillance LTC Outbreaks
- Sentinel Provider Surveillance (Outpatients)
- Laboratory Surveillance
- Minnesota Influenza Incidence Surveillance Project (MIISP)
- Weekly US Influenza Surveillance Report
-
Week 2015-16 2016-17 2017-18 2018-19 2019-20 2020-21
40 0 0 1 0 0 0
41 0 0 0 0 0 0
42 0 0 0 0 0 0
43 0 0 0 1 0
44 0 1 0 0 0
45 0 2 0 0 1
46 0 1 0 1 0
47 1 2 0 0 0
48 0 1 1 1 0
49 2 2 1 1 0
50 2 9 0 3 0
51 1 12 3 2 0
52 1 12 2 3 0
1 2 31 1 8 3
2 2 49 1 10 1
3 7 35 3 4 0
4 6 48 3 5 1
5 7 32 4 8 1
6 16 36 3 7 0
7 26 30 8 9 0
8 28 27 8 13 0
9 21 25 2 21 0
10 22 12 13 16 0
11 28 16 10 15 0
12 24 7 12 11 0
13 13 11 3 5 0
14 19 10 6 4 0
15 16 9 4 3 0
16 12 5 2 0 0
17 6 4 1 0 0
18 4 2 2 1 0
19 4 2 1 1 0
20 0 2 0 0 0
3 0 0
Week 2015-16 2016-17 2017-18 2018-19 2019-20 2020-21
0-17 2 6 1 3 0 0
18-49 10 10 9 15 2 0
50-64 20 37 16 31 1 0
65-79 60 101 33 51 1 0
80+ 181 281 36 53 3 0
0
5
10
15
20
25
30
35
40
45
50
40 42 44 46 48 50 52 1 3 5 7 9 11 13 15 17 19
Num
ber o
f Dea
ths
MMWR Week of Death
2016-17
2017-18
2018-19
2019-20
2020-21
2021-22
0
50
100
150
200
250
300
0-17 18-49 50-64 65-79 80+N
umbe
r of D
eath
sAge Group (years)
2016-17 2017-18 2018-19 2019-20 2020-21 2021-22
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 4
Influenza-Associated Death Surveillance
Influenza deaths are collected via reports from Minnesotarsquos death certificate database hospitals and long-term care facilities Decedents with influenza listed as a cause of or contributor to death have recent laboratory confirmation of influenza or are part of an ongoing influenza outbreak at a long-term care facility are reported to influenza surveillance Due to the need to confirm reports and reporting delays consider current week data preliminary
Deaths Associated with Influenza by Season Minnesota
Deaths Associated with Influenza by Age Group and Season Minnesota
Season Median age (years) at time of death
2016-2017 86
2017-2018 85
2018-2019 75
2019-2020 73
2020-2021 76
2021-2022 ---FluSurv-NET = Influenza Surveillance Network
Season Total deaths (historic) Total pediatric (lt18 years) deaths (historic)
2016-2017 273 2
2017-2018 440 6
2018-2019 126 1
2019-2020 197 3
2020-2021 7 0
2021-2022 0 0
Week 2016-17dagger 2017-18dagger 2018-19dagger 2019-20dagger 2020-21
40 0 1 1 0 8
41 2 1 3 0 8
42 1 0 1 1 1
43 0 0 4 0
44 2 2 0 0
45 1 4 4 1
46 3 0 7 1
47 2 1 19 0
48 1 1 7 0
49 5 5 14 0
50 19 5 61 0
51 3 6 172 0
52 3 0 5 0
53 5 0 9 0
1 73 12 32 0
2 122 38 121 0
3 77 31 79 0
4 103 8 91 0
5 109 16 79 0
6 66 38 66 0
7 22 30 35 0
8 23 22 44 1
9 4 43 22 0
10 16 33 25 0
11 7 26 2 0
12 3 15 0 0
13 4 12 0 0
14 8 10 0 0
15 8 2 0 0
16 0 5 0 0
17 1 6 0 0
18 3 6 0 0
19 0 4 0 1
20
0
50
100
150
200
40 41 42 43 44 45 46 47 48 49 50 51 52 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Num
ber o
f Inf
luen
za-li
ke Il
lnes
s Out
brea
ks
MMWR Week
2017-18
2018-19
2019-20
2020-21
2021-22
Current week
Note 61 outbreaks were reported pre-season during weeks 37-39
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 5
Respiratory Disease Outbreak Surveillance School Outbreaks
K-12 schools report an outbreak of influenza-like illness (ILI) when the number of students absent with ILI reaches 5 of total enrollment or three or more students with ILI are absent from the same elementary classroom
Influenza-like Illness (ILI) in Schools by Season
New school outbreaks this week New school outbreaks last week Total this season (to date)1 8 17dagger The Week 53 value for these seasons is the average of Week 52 and Week 1
Week 2016-17dagger 2017-18dagger 2018-19dagger 2019-20dagger 2020-21
0 0 0 0 0 1
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
1 0 0 2 1
0 1 1 0 0
1 0 0 1 0
0 5 0 1 1
1 3 0 2 0
2 3 0 0 0
1 1 0 2 0
2 18 1 0 0
3 23 0 6 1
3 36 0 6 0
6 24 2 4 0
9 10 2 7 0
11 13 6 9 0
12 13 5 7 0
11 10 3 6 1
21 13 4 19 0
14 8 6 10 1
12 3 5 11 0
11 4 7 8 0
11 9 4 4 0
7 4 3 0 0
10 6 2 0 0
12 1 0 1 0
6 0 2 0 0
7 0 2 0 0
1 1 2 0 0
3 2 1 0
3 0 1 0
2
0
5
10
15
20
25
30
35
40
40 41 42 43 44 45 46 47 48 49 50 51 52 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Num
ber o
f lab
-con
firm
ed o
utbr
eaks
MMWR Week
2017-18
2018-19
2019-20
2020-21
2021-22
Current week
Note 1 outbreak was reported pre-season during weeks 39
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 6
Respiratory Disease Outbreak Surveillance LTC OutbreaksLong-Term Care (LTC) facilities report to MDH when they suspect an outbreak of influenza in their facility Laboratory-confirmed outbreaks are reported here
Confirmed Influenza Outbreaks in LTC by Season
dagger The Week 53 value for these seasons is the average of Week 52 and Week 1
New LTC outbreacksI this week New LTCoutbreaks last week Total this season (to date)0 0 1
Week 2016-17dagger 2017-18dagger 2018-19dagger 2019-20dagger 2020-21 2020-21 MN BaselineDagger
40 143 128562 242367 066 13 28
41 143 171591 233836 087 106 28
42 142 139559 221124 073 8800 28
43 124 153928 239513 05 28
44 137 224719 240882 055 28
45 142 175836 227738 07 28
46 164 184595 243498 065 28
47 166 220573 272668 05 28
48 147 208246 405946 042 28
49 215 189865 352987 033 28
50 23 267372 353594 025 28
51 294 258014 565083 014 28
52 364 340117 971059 012 28
53 423 327022 37 024 28
1 506 474847 36 017 28
2 581 321409 33 018 28
3 632 379504 39 028 28
4 646 377994 48 046 28
5 673 325786 54 023 28
6 569 34634 64 03 28
7 533 372245 52 027 28
8 447 33982 54 035 28
9 376 359236 52 027 28
10 298 356018 44 043 28
11 239 303359 36 033 28
12 233 228605 23 035 28
13 166 241452 22 036 28
14 209 22887 16 042 28
15 218 214939 13 042 28
16 165 245684 15 047 28
17 176 215866 16 045 28
18 168 18928 19 043 28
19 14 231566 1 068 28
20
0
2
4
6
8
10
12
40 41 42 43 44 45 46 47 48 49 50 51 52 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Perc
ent w
ith In
fluen
za-li
ke Il
lnes
s
MMWR Week
2017-18
2018-19
2019-20
2020-21
2021-22
Pre-pandemic MN Baselinedagger
Current week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 7
Sentinel Provider Surveillance (Outpatients)
MDH collaborates with healthcare providers who report the total number of patients seen and the total number of those patients presenting to outpatient clinics with influenza-like illness
Percentage of Persons Presenting to Outpatient Clinics with Influenza-Like Illness (ILI)
of outpatients with ILI this week of outpatients with ILI last week
09 11
Indicates current week-data may be delayed by 1 or more weeks dagger The Week 53 value for these seasons is the average of Week 52 and Week 1Dagger MN Baseline valid for 2020-21 season only do not compare it with previous seasons The baseline is
calculated by averaging the ILI percent for non-influenza weeks over the previous four seasons and adding two standard deviations Non-influenza weeks account for less than 2 of the seasonrsquos total flu-positive specimens tested at Public Health Labs in HHS Region 5 Weeks where ILI is above baseline reflect weeks with excess health care visits due to ILI
Week A (H1N1) pdm09 A H3 A (not subtyped) B 2016-17 + by PCR 2017-18 + by PCR 2018-19 + by PCR 2019-20 + by PCR 2020-21 + by PCR
40 3 1 025 0 013175 0 013
41 1 2 019 0123 034247 06 01
42 0 1 0 1 129 0898 095238 03 0108
43 078 06924 202899 0
44 174 1139 137112 02
45 351 03525 332577 0
46 482 034404 331263 01
47 633 047733 859206 01
48 61 10506 992443 0
49 557 06435 116883 01
50 1063 200222 173616 003
51 2219 38961 25333 01
52 2662 6875 287995 01
53 2373 689858 247537 0
1 2608 8645 238247 009
2 3128 11334 291924 0
3 2973 15812 285285 016
4 256 198343 313398 006
5 2463 219485 330324 0
6 2433 257567 359588 0065
7 229 260141 341712 0073
8 2105 255621 354538 0
9 1938 267438 277136 018
10 1745 239014 22092 0
11 1801 224066 928172 012
12 1689 1891 510657 0
13 1711 192825 105079 0
14 1463 105078 0 0045
15 1132 887902 0 0
16 144 743062 0 0
17 1196 554455 0 0
18 529 481348 0 0
19 538 441176 0
0
0
5
10
15
20
25
30
35
40
45
50
0
5
10
15
20
25
30
40 41 42 43 44 45 46 47 48 49 50 51 52 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Percent of Positive Molecular TestsN
umbe
r of P
ositi
ve M
olec
ular
Tes
ts
MMWR Week
B
A (not subtyped)
A H3
A (H1N1) pdm09
2017-18 + by PCR
2018-19 + by PCR
2019-20 + by PCR
2020-21 + by PCR
2021-22 + by PCR
Current week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 8
Laboratory Surveillance
The MN Lab System (MLS) Laboratory Influenza Surveillance Program is made up of more than 310 clinic- and hospital-based laboratories voluntarily submitting testing data weekly These laboratories perform rapid testing for influenza and Respiratory Syncytial Virus (RSV) Significantly fewer labs perform PCR testing for influenza and three also perform PCR testing for other respiratory viruses MDH-PHL provides further characterization of submitted influenza isolates to determine the hemagglutinin serotype to indicate vaccine coverage Tracking the laboratory results assists healthcare providers with patient diagnosis of influenza-like illness and provides an indicator of the progression of the influenza season as well as prevalence of disease in the community
Specimens Positive for Influenza by Molecular Testing by Week
of molecular tests positive this week of molecular tests positive last week
01 01
Beginning in 2016-17 laboratories report results for rapid molecular influenza tests in addition to RT-PCR results
dagger The Week 53 value for these seasons is the average of Week 52 and Week 1
Region AB+ A+ B+ dagger2015-16 + dagger2016-17 + dagger2017-18 + dagger2018-19 + dagger2019-20 + 2020-21 +
40 0 0 0 203 036 1145 103448 0 0
41 0 1 2 072 22 0715 232558 4 23
42 0 1 4 170 203 2916 221239 18 27
43 524 187 16344 18 12
44 196 172 2489 316742 11
45 192 347 08658 468948 32
46 240 485 315501 601589 07
47 460 734 332 95373 34
48 600 113 2247 127993 21
49 501 1109 199336 152819 31
50 788 1562 260869 237288 18
51 934 2187 405872 284537 0
52 1325 3006 919143 311344 18
53 12675 28255 8677865 2940235 265
1 1210 2645 81643 276703 081
2 1338 2899 134066 262082 22
3 1865 3389 167612 312544 0
4 2269 3316 227335 330813 0
5 2427 3239 254458 359291 28
6 2696 271 249393 360528 0
7 3081 2975 28238 368231 574
8 2756 2987 287495 342097 221
9 2689 2712 297446 350487 233
10 2990 2243 315927 309389 0
11 3028 2194 338757 226124 079
12 3082 1891 281729 136591 109
13 2704 1984 253886 407303 159
14 2369 1648 224849 188442 408
15 2180 1771 21995 219178 122
16 1810 172 149654 134771 0
17 1074 1679 149688 104167 175
18 900 148 14718 181818 159
19 980 983 137681 714
20 775 886 133891 0
Region Number + dagger2016-17 + dagger2017-18 + dagger2018-19 + dagger2019-20 + 2020-21+
40 56 1304 1489 810811 91 21
41 106 10 1327 625 10 36
42 72 65 7 493827 158 348
43 96 6767 123711 13
44 93 20408 208333 33
45 91 12381 894309 0
46 25 196429 155844 0
47 241 2227 281633 0
48 2949 29787 237013 77
49 2601 364 26378 0
50 3205 372881 251724 0
51 4051 350133 26824 59
52 3767 324009 291747 0
53 3581 358621 319404 714
1 313 37844 245742 0
2 3291 320833 262443 0
3 3006 320366 201729 105
4 3211 255937 228261 0
5 3043 304094 235474 0
6 2667 29683 190736 0
7 3041 206997 211144 435
8 2248 183871 169675 0
9 2283 214925 142857 0
10 2627 1512 881543 0
11 873 1666667 102881 0
12 1186 179916 48346 0
13 1603 115555 205882 0
14 909 903226 204082 333
15 583 958904 30303 0
16 735 34247 263158 769
17 411 84033 181818 0
18 8 289855 0
19 15 322581 454
20 1 57 15 322581 454
0
5
10
15
20
25
30
35
40
45
50
0
2
4
6
8
10
12
14
16
18
20
40 42 44 46 48 50 52 1 3 5 7 9 11 13 15 17 19
Percentage of Rapid Antigen Influenza Tests Positive
Num
ber o
f Pos
itive
Influ
enza
Spe
cim
ens
MMWR Week
AB+ A+B+ 2016-17 +2017-18 + 2018-19 +2019-20 + 2020-21 +
Current week
0
10
20
30
40
50
60
70
80
90
100
0
25
50
75
100
125
150
175
200
225
250
275
300
40 42 44 46 48 50 52 2 4 6 8 10 12 14 16 18 20
Percentage of Rapid Antigen RSV Tests Positive
Num
ber o
f Pos
itive
RSV
Tes
ts
MMWR Week
Number +
2017-18 +
2018-19 +
2019-20 +
2020-21+
2021-22+
Current week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 9
Laboratory Surveillance (continued)MLS Laboratories ndash Influenza Testing
Specimens Positive by Influenza Rapid Antigen Test by WeekMLS Laboratories ndash RSV Testing
Specimens Positive by RSV Rapid Antigen Test by Week
Region rapid antigen influenza tests + this week
Central 1
Metro 3
Northeast 0
Northwest 0
South Central 6
Southeast 0
Southwest 0
West Central 0
Statewide (overall) 3
Region rapid antigen RSV tests + this week
Central 30
Metro 25
Northeast 0
Northwest 33
South Central 49
Southeast 37
Southwest 35
West Central 35
Statewide (overall) 35dagger The Week 53 value for these seasons is the average of Week 52 and Week 1
Week COVID-positive Flu-positive RSV-positive Other-pathogen positive All tests negative
40 0 0 5 9 28
41 5 0 0 0 17
42 2 0 0 0 13
43
44
45
46
47
48
49
50
51
52
53
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
0
10
20
30
40
50
60
40 41 42 43 44 45 46 47 48 49 50 51 52 53 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Num
ber P
ositi
ve b
y RT
-PCR
MMWR Week
COVID-positive Flu-positive RSV-positive Other-pathogen positive All tests negative
Current week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 10
Minnesota Influenza Incidence Surveillance Project (MIISP)
MIISP surveillance sites collect 10-20 specimens every week on patients presenting with acute respiratory illness with or without fever The graph below illustrate the number of positive results by virus family detected each week The primary purpose of these graphs is to visualize the respiratory viruses circulating in Minnesota
MIISP Testing (Outpatient) by Week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 11
Minnesota Influenza Incidence Surveillance Project (continued)
Pathogen Group Pathogen Frequency Percent of detections
All Negative None 58
Adenovirus Adenovirus 1 5
Bocavirus Bocavirus - -
Influenza Flu AH12009 - -
Flu AH1seasonal - -
Flu AH3 - -
Flu AUnknown - -
Flu AUnsubtypeable - -
Flu B - -
Parainfluenza Parainfluenza-1 - -
Parainfluenza-2 - -
Parainfluenza-3 - -
Parainfluenza-4 - -
RSVMetapneumovirus Metapneumovirus - -
RSV 5 24
Seasonal Coronavirus Coronavirus-229E - -
Coronavirus-HKU1 - -
Coronavirus-NL63 - -
Coronavirus-OC43 - -
RhinovirusEnterovirus Enterovirus - -
Rhinovirus - -
RhinovirusEnterovirus (non-differentiated) 8 38
SARS-CoV-2 (COVID-19) SARS-CoV-2 7 33
This table details the specific viruses detected during the 2020-21 Influenza season Viruses are grouped by the virus family they belong to with the exception of SARS-CoV-2 (the virus that causes COVID-19) which is singled out from the seasonal coronaviruses that regularly circulate throughout the year
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 12
Weekly US Influenza Surveillance Report
Week 41 ending Oct 16 2021Seasonal influenza activity in the United States remains lowbull An annual flu vaccine is the best way to protect against flu and its potentially serious complicationsbull CDC recommends everyone 6 months or older get a flu vaccine by the end of Octoberbull There also are flu antiviral drugs that can be used to treat flu illness
Outpatient Illness ILINet Activity Map
This week 2 jurisdictions experienced moderate activity and no jurisdictions experienced high or very high activity
CDC National Influenza Surveillance (httpwwwcdcgovfluweekly)
- Hospitalized Influenza Surveillance
- Influenza-Associated Death Surveillance
- Respiratory Disease Outbreak Surveillance School Outbreaks
- Respiratory Disease Outbreak Surveillance LTC Outbreaks
- Sentinel Provider Surveillance (Outpatients)
- Laboratory Surveillance
- Minnesota Influenza Incidence Surveillance Project (MIISP)
- Weekly US Influenza Surveillance Report
-
Week 2016-17dagger 2017-18dagger 2018-19dagger 2019-20dagger 2020-21
40 0 1 1 0 8
41 2 1 3 0 8
42 1 0 1 1 1
43 0 0 4 0
44 2 2 0 0
45 1 4 4 1
46 3 0 7 1
47 2 1 19 0
48 1 1 7 0
49 5 5 14 0
50 19 5 61 0
51 3 6 172 0
52 3 0 5 0
53 5 0 9 0
1 73 12 32 0
2 122 38 121 0
3 77 31 79 0
4 103 8 91 0
5 109 16 79 0
6 66 38 66 0
7 22 30 35 0
8 23 22 44 1
9 4 43 22 0
10 16 33 25 0
11 7 26 2 0
12 3 15 0 0
13 4 12 0 0
14 8 10 0 0
15 8 2 0 0
16 0 5 0 0
17 1 6 0 0
18 3 6 0 0
19 0 4 0 1
20
0
50
100
150
200
40 41 42 43 44 45 46 47 48 49 50 51 52 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Num
ber o
f Inf
luen
za-li
ke Il
lnes
s Out
brea
ks
MMWR Week
2017-18
2018-19
2019-20
2020-21
2021-22
Current week
Note 61 outbreaks were reported pre-season during weeks 37-39
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 5
Respiratory Disease Outbreak Surveillance School Outbreaks
K-12 schools report an outbreak of influenza-like illness (ILI) when the number of students absent with ILI reaches 5 of total enrollment or three or more students with ILI are absent from the same elementary classroom
Influenza-like Illness (ILI) in Schools by Season
New school outbreaks this week New school outbreaks last week Total this season (to date)1 8 17dagger The Week 53 value for these seasons is the average of Week 52 and Week 1
Week 2016-17dagger 2017-18dagger 2018-19dagger 2019-20dagger 2020-21
0 0 0 0 0 1
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
1 0 0 2 1
0 1 1 0 0
1 0 0 1 0
0 5 0 1 1
1 3 0 2 0
2 3 0 0 0
1 1 0 2 0
2 18 1 0 0
3 23 0 6 1
3 36 0 6 0
6 24 2 4 0
9 10 2 7 0
11 13 6 9 0
12 13 5 7 0
11 10 3 6 1
21 13 4 19 0
14 8 6 10 1
12 3 5 11 0
11 4 7 8 0
11 9 4 4 0
7 4 3 0 0
10 6 2 0 0
12 1 0 1 0
6 0 2 0 0
7 0 2 0 0
1 1 2 0 0
3 2 1 0
3 0 1 0
2
0
5
10
15
20
25
30
35
40
40 41 42 43 44 45 46 47 48 49 50 51 52 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Num
ber o
f lab
-con
firm
ed o
utbr
eaks
MMWR Week
2017-18
2018-19
2019-20
2020-21
2021-22
Current week
Note 1 outbreak was reported pre-season during weeks 39
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 6
Respiratory Disease Outbreak Surveillance LTC OutbreaksLong-Term Care (LTC) facilities report to MDH when they suspect an outbreak of influenza in their facility Laboratory-confirmed outbreaks are reported here
Confirmed Influenza Outbreaks in LTC by Season
dagger The Week 53 value for these seasons is the average of Week 52 and Week 1
New LTC outbreacksI this week New LTCoutbreaks last week Total this season (to date)0 0 1
Week 2016-17dagger 2017-18dagger 2018-19dagger 2019-20dagger 2020-21 2020-21 MN BaselineDagger
40 143 128562 242367 066 13 28
41 143 171591 233836 087 106 28
42 142 139559 221124 073 8800 28
43 124 153928 239513 05 28
44 137 224719 240882 055 28
45 142 175836 227738 07 28
46 164 184595 243498 065 28
47 166 220573 272668 05 28
48 147 208246 405946 042 28
49 215 189865 352987 033 28
50 23 267372 353594 025 28
51 294 258014 565083 014 28
52 364 340117 971059 012 28
53 423 327022 37 024 28
1 506 474847 36 017 28
2 581 321409 33 018 28
3 632 379504 39 028 28
4 646 377994 48 046 28
5 673 325786 54 023 28
6 569 34634 64 03 28
7 533 372245 52 027 28
8 447 33982 54 035 28
9 376 359236 52 027 28
10 298 356018 44 043 28
11 239 303359 36 033 28
12 233 228605 23 035 28
13 166 241452 22 036 28
14 209 22887 16 042 28
15 218 214939 13 042 28
16 165 245684 15 047 28
17 176 215866 16 045 28
18 168 18928 19 043 28
19 14 231566 1 068 28
20
0
2
4
6
8
10
12
40 41 42 43 44 45 46 47 48 49 50 51 52 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Perc
ent w
ith In
fluen
za-li
ke Il
lnes
s
MMWR Week
2017-18
2018-19
2019-20
2020-21
2021-22
Pre-pandemic MN Baselinedagger
Current week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 7
Sentinel Provider Surveillance (Outpatients)
MDH collaborates with healthcare providers who report the total number of patients seen and the total number of those patients presenting to outpatient clinics with influenza-like illness
Percentage of Persons Presenting to Outpatient Clinics with Influenza-Like Illness (ILI)
of outpatients with ILI this week of outpatients with ILI last week
09 11
Indicates current week-data may be delayed by 1 or more weeks dagger The Week 53 value for these seasons is the average of Week 52 and Week 1Dagger MN Baseline valid for 2020-21 season only do not compare it with previous seasons The baseline is
calculated by averaging the ILI percent for non-influenza weeks over the previous four seasons and adding two standard deviations Non-influenza weeks account for less than 2 of the seasonrsquos total flu-positive specimens tested at Public Health Labs in HHS Region 5 Weeks where ILI is above baseline reflect weeks with excess health care visits due to ILI
Week A (H1N1) pdm09 A H3 A (not subtyped) B 2016-17 + by PCR 2017-18 + by PCR 2018-19 + by PCR 2019-20 + by PCR 2020-21 + by PCR
40 3 1 025 0 013175 0 013
41 1 2 019 0123 034247 06 01
42 0 1 0 1 129 0898 095238 03 0108
43 078 06924 202899 0
44 174 1139 137112 02
45 351 03525 332577 0
46 482 034404 331263 01
47 633 047733 859206 01
48 61 10506 992443 0
49 557 06435 116883 01
50 1063 200222 173616 003
51 2219 38961 25333 01
52 2662 6875 287995 01
53 2373 689858 247537 0
1 2608 8645 238247 009
2 3128 11334 291924 0
3 2973 15812 285285 016
4 256 198343 313398 006
5 2463 219485 330324 0
6 2433 257567 359588 0065
7 229 260141 341712 0073
8 2105 255621 354538 0
9 1938 267438 277136 018
10 1745 239014 22092 0
11 1801 224066 928172 012
12 1689 1891 510657 0
13 1711 192825 105079 0
14 1463 105078 0 0045
15 1132 887902 0 0
16 144 743062 0 0
17 1196 554455 0 0
18 529 481348 0 0
19 538 441176 0
0
0
5
10
15
20
25
30
35
40
45
50
0
5
10
15
20
25
30
40 41 42 43 44 45 46 47 48 49 50 51 52 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Percent of Positive Molecular TestsN
umbe
r of P
ositi
ve M
olec
ular
Tes
ts
MMWR Week
B
A (not subtyped)
A H3
A (H1N1) pdm09
2017-18 + by PCR
2018-19 + by PCR
2019-20 + by PCR
2020-21 + by PCR
2021-22 + by PCR
Current week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 8
Laboratory Surveillance
The MN Lab System (MLS) Laboratory Influenza Surveillance Program is made up of more than 310 clinic- and hospital-based laboratories voluntarily submitting testing data weekly These laboratories perform rapid testing for influenza and Respiratory Syncytial Virus (RSV) Significantly fewer labs perform PCR testing for influenza and three also perform PCR testing for other respiratory viruses MDH-PHL provides further characterization of submitted influenza isolates to determine the hemagglutinin serotype to indicate vaccine coverage Tracking the laboratory results assists healthcare providers with patient diagnosis of influenza-like illness and provides an indicator of the progression of the influenza season as well as prevalence of disease in the community
Specimens Positive for Influenza by Molecular Testing by Week
of molecular tests positive this week of molecular tests positive last week
01 01
Beginning in 2016-17 laboratories report results for rapid molecular influenza tests in addition to RT-PCR results
dagger The Week 53 value for these seasons is the average of Week 52 and Week 1
Region AB+ A+ B+ dagger2015-16 + dagger2016-17 + dagger2017-18 + dagger2018-19 + dagger2019-20 + 2020-21 +
40 0 0 0 203 036 1145 103448 0 0
41 0 1 2 072 22 0715 232558 4 23
42 0 1 4 170 203 2916 221239 18 27
43 524 187 16344 18 12
44 196 172 2489 316742 11
45 192 347 08658 468948 32
46 240 485 315501 601589 07
47 460 734 332 95373 34
48 600 113 2247 127993 21
49 501 1109 199336 152819 31
50 788 1562 260869 237288 18
51 934 2187 405872 284537 0
52 1325 3006 919143 311344 18
53 12675 28255 8677865 2940235 265
1 1210 2645 81643 276703 081
2 1338 2899 134066 262082 22
3 1865 3389 167612 312544 0
4 2269 3316 227335 330813 0
5 2427 3239 254458 359291 28
6 2696 271 249393 360528 0
7 3081 2975 28238 368231 574
8 2756 2987 287495 342097 221
9 2689 2712 297446 350487 233
10 2990 2243 315927 309389 0
11 3028 2194 338757 226124 079
12 3082 1891 281729 136591 109
13 2704 1984 253886 407303 159
14 2369 1648 224849 188442 408
15 2180 1771 21995 219178 122
16 1810 172 149654 134771 0
17 1074 1679 149688 104167 175
18 900 148 14718 181818 159
19 980 983 137681 714
20 775 886 133891 0
Region Number + dagger2016-17 + dagger2017-18 + dagger2018-19 + dagger2019-20 + 2020-21+
40 56 1304 1489 810811 91 21
41 106 10 1327 625 10 36
42 72 65 7 493827 158 348
43 96 6767 123711 13
44 93 20408 208333 33
45 91 12381 894309 0
46 25 196429 155844 0
47 241 2227 281633 0
48 2949 29787 237013 77
49 2601 364 26378 0
50 3205 372881 251724 0
51 4051 350133 26824 59
52 3767 324009 291747 0
53 3581 358621 319404 714
1 313 37844 245742 0
2 3291 320833 262443 0
3 3006 320366 201729 105
4 3211 255937 228261 0
5 3043 304094 235474 0
6 2667 29683 190736 0
7 3041 206997 211144 435
8 2248 183871 169675 0
9 2283 214925 142857 0
10 2627 1512 881543 0
11 873 1666667 102881 0
12 1186 179916 48346 0
13 1603 115555 205882 0
14 909 903226 204082 333
15 583 958904 30303 0
16 735 34247 263158 769
17 411 84033 181818 0
18 8 289855 0
19 15 322581 454
20 1 57 15 322581 454
0
5
10
15
20
25
30
35
40
45
50
0
2
4
6
8
10
12
14
16
18
20
40 42 44 46 48 50 52 1 3 5 7 9 11 13 15 17 19
Percentage of Rapid Antigen Influenza Tests Positive
Num
ber o
f Pos
itive
Influ
enza
Spe
cim
ens
MMWR Week
AB+ A+B+ 2016-17 +2017-18 + 2018-19 +2019-20 + 2020-21 +
Current week
0
10
20
30
40
50
60
70
80
90
100
0
25
50
75
100
125
150
175
200
225
250
275
300
40 42 44 46 48 50 52 2 4 6 8 10 12 14 16 18 20
Percentage of Rapid Antigen RSV Tests Positive
Num
ber o
f Pos
itive
RSV
Tes
ts
MMWR Week
Number +
2017-18 +
2018-19 +
2019-20 +
2020-21+
2021-22+
Current week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 9
Laboratory Surveillance (continued)MLS Laboratories ndash Influenza Testing
Specimens Positive by Influenza Rapid Antigen Test by WeekMLS Laboratories ndash RSV Testing
Specimens Positive by RSV Rapid Antigen Test by Week
Region rapid antigen influenza tests + this week
Central 1
Metro 3
Northeast 0
Northwest 0
South Central 6
Southeast 0
Southwest 0
West Central 0
Statewide (overall) 3
Region rapid antigen RSV tests + this week
Central 30
Metro 25
Northeast 0
Northwest 33
South Central 49
Southeast 37
Southwest 35
West Central 35
Statewide (overall) 35dagger The Week 53 value for these seasons is the average of Week 52 and Week 1
Week COVID-positive Flu-positive RSV-positive Other-pathogen positive All tests negative
40 0 0 5 9 28
41 5 0 0 0 17
42 2 0 0 0 13
43
44
45
46
47
48
49
50
51
52
53
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
0
10
20
30
40
50
60
40 41 42 43 44 45 46 47 48 49 50 51 52 53 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Num
ber P
ositi
ve b
y RT
-PCR
MMWR Week
COVID-positive Flu-positive RSV-positive Other-pathogen positive All tests negative
Current week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 10
Minnesota Influenza Incidence Surveillance Project (MIISP)
MIISP surveillance sites collect 10-20 specimens every week on patients presenting with acute respiratory illness with or without fever The graph below illustrate the number of positive results by virus family detected each week The primary purpose of these graphs is to visualize the respiratory viruses circulating in Minnesota
MIISP Testing (Outpatient) by Week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 11
Minnesota Influenza Incidence Surveillance Project (continued)
Pathogen Group Pathogen Frequency Percent of detections
All Negative None 58
Adenovirus Adenovirus 1 5
Bocavirus Bocavirus - -
Influenza Flu AH12009 - -
Flu AH1seasonal - -
Flu AH3 - -
Flu AUnknown - -
Flu AUnsubtypeable - -
Flu B - -
Parainfluenza Parainfluenza-1 - -
Parainfluenza-2 - -
Parainfluenza-3 - -
Parainfluenza-4 - -
RSVMetapneumovirus Metapneumovirus - -
RSV 5 24
Seasonal Coronavirus Coronavirus-229E - -
Coronavirus-HKU1 - -
Coronavirus-NL63 - -
Coronavirus-OC43 - -
RhinovirusEnterovirus Enterovirus - -
Rhinovirus - -
RhinovirusEnterovirus (non-differentiated) 8 38
SARS-CoV-2 (COVID-19) SARS-CoV-2 7 33
This table details the specific viruses detected during the 2020-21 Influenza season Viruses are grouped by the virus family they belong to with the exception of SARS-CoV-2 (the virus that causes COVID-19) which is singled out from the seasonal coronaviruses that regularly circulate throughout the year
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 12
Weekly US Influenza Surveillance Report
Week 41 ending Oct 16 2021Seasonal influenza activity in the United States remains lowbull An annual flu vaccine is the best way to protect against flu and its potentially serious complicationsbull CDC recommends everyone 6 months or older get a flu vaccine by the end of Octoberbull There also are flu antiviral drugs that can be used to treat flu illness
Outpatient Illness ILINet Activity Map
This week 2 jurisdictions experienced moderate activity and no jurisdictions experienced high or very high activity
CDC National Influenza Surveillance (httpwwwcdcgovfluweekly)
- Hospitalized Influenza Surveillance
- Influenza-Associated Death Surveillance
- Respiratory Disease Outbreak Surveillance School Outbreaks
- Respiratory Disease Outbreak Surveillance LTC Outbreaks
- Sentinel Provider Surveillance (Outpatients)
- Laboratory Surveillance
- Minnesota Influenza Incidence Surveillance Project (MIISP)
- Weekly US Influenza Surveillance Report
-
Week 2016-17dagger 2017-18dagger 2018-19dagger 2019-20dagger 2020-21
0 0 0 0 0 1
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
1 0 0 2 1
0 1 1 0 0
1 0 0 1 0
0 5 0 1 1
1 3 0 2 0
2 3 0 0 0
1 1 0 2 0
2 18 1 0 0
3 23 0 6 1
3 36 0 6 0
6 24 2 4 0
9 10 2 7 0
11 13 6 9 0
12 13 5 7 0
11 10 3 6 1
21 13 4 19 0
14 8 6 10 1
12 3 5 11 0
11 4 7 8 0
11 9 4 4 0
7 4 3 0 0
10 6 2 0 0
12 1 0 1 0
6 0 2 0 0
7 0 2 0 0
1 1 2 0 0
3 2 1 0
3 0 1 0
2
0
5
10
15
20
25
30
35
40
40 41 42 43 44 45 46 47 48 49 50 51 52 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Num
ber o
f lab
-con
firm
ed o
utbr
eaks
MMWR Week
2017-18
2018-19
2019-20
2020-21
2021-22
Current week
Note 1 outbreak was reported pre-season during weeks 39
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 6
Respiratory Disease Outbreak Surveillance LTC OutbreaksLong-Term Care (LTC) facilities report to MDH when they suspect an outbreak of influenza in their facility Laboratory-confirmed outbreaks are reported here
Confirmed Influenza Outbreaks in LTC by Season
dagger The Week 53 value for these seasons is the average of Week 52 and Week 1
New LTC outbreacksI this week New LTCoutbreaks last week Total this season (to date)0 0 1
Week 2016-17dagger 2017-18dagger 2018-19dagger 2019-20dagger 2020-21 2020-21 MN BaselineDagger
40 143 128562 242367 066 13 28
41 143 171591 233836 087 106 28
42 142 139559 221124 073 8800 28
43 124 153928 239513 05 28
44 137 224719 240882 055 28
45 142 175836 227738 07 28
46 164 184595 243498 065 28
47 166 220573 272668 05 28
48 147 208246 405946 042 28
49 215 189865 352987 033 28
50 23 267372 353594 025 28
51 294 258014 565083 014 28
52 364 340117 971059 012 28
53 423 327022 37 024 28
1 506 474847 36 017 28
2 581 321409 33 018 28
3 632 379504 39 028 28
4 646 377994 48 046 28
5 673 325786 54 023 28
6 569 34634 64 03 28
7 533 372245 52 027 28
8 447 33982 54 035 28
9 376 359236 52 027 28
10 298 356018 44 043 28
11 239 303359 36 033 28
12 233 228605 23 035 28
13 166 241452 22 036 28
14 209 22887 16 042 28
15 218 214939 13 042 28
16 165 245684 15 047 28
17 176 215866 16 045 28
18 168 18928 19 043 28
19 14 231566 1 068 28
20
0
2
4
6
8
10
12
40 41 42 43 44 45 46 47 48 49 50 51 52 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Perc
ent w
ith In
fluen
za-li
ke Il
lnes
s
MMWR Week
2017-18
2018-19
2019-20
2020-21
2021-22
Pre-pandemic MN Baselinedagger
Current week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 7
Sentinel Provider Surveillance (Outpatients)
MDH collaborates with healthcare providers who report the total number of patients seen and the total number of those patients presenting to outpatient clinics with influenza-like illness
Percentage of Persons Presenting to Outpatient Clinics with Influenza-Like Illness (ILI)
of outpatients with ILI this week of outpatients with ILI last week
09 11
Indicates current week-data may be delayed by 1 or more weeks dagger The Week 53 value for these seasons is the average of Week 52 and Week 1Dagger MN Baseline valid for 2020-21 season only do not compare it with previous seasons The baseline is
calculated by averaging the ILI percent for non-influenza weeks over the previous four seasons and adding two standard deviations Non-influenza weeks account for less than 2 of the seasonrsquos total flu-positive specimens tested at Public Health Labs in HHS Region 5 Weeks where ILI is above baseline reflect weeks with excess health care visits due to ILI
Week A (H1N1) pdm09 A H3 A (not subtyped) B 2016-17 + by PCR 2017-18 + by PCR 2018-19 + by PCR 2019-20 + by PCR 2020-21 + by PCR
40 3 1 025 0 013175 0 013
41 1 2 019 0123 034247 06 01
42 0 1 0 1 129 0898 095238 03 0108
43 078 06924 202899 0
44 174 1139 137112 02
45 351 03525 332577 0
46 482 034404 331263 01
47 633 047733 859206 01
48 61 10506 992443 0
49 557 06435 116883 01
50 1063 200222 173616 003
51 2219 38961 25333 01
52 2662 6875 287995 01
53 2373 689858 247537 0
1 2608 8645 238247 009
2 3128 11334 291924 0
3 2973 15812 285285 016
4 256 198343 313398 006
5 2463 219485 330324 0
6 2433 257567 359588 0065
7 229 260141 341712 0073
8 2105 255621 354538 0
9 1938 267438 277136 018
10 1745 239014 22092 0
11 1801 224066 928172 012
12 1689 1891 510657 0
13 1711 192825 105079 0
14 1463 105078 0 0045
15 1132 887902 0 0
16 144 743062 0 0
17 1196 554455 0 0
18 529 481348 0 0
19 538 441176 0
0
0
5
10
15
20
25
30
35
40
45
50
0
5
10
15
20
25
30
40 41 42 43 44 45 46 47 48 49 50 51 52 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Percent of Positive Molecular TestsN
umbe
r of P
ositi
ve M
olec
ular
Tes
ts
MMWR Week
B
A (not subtyped)
A H3
A (H1N1) pdm09
2017-18 + by PCR
2018-19 + by PCR
2019-20 + by PCR
2020-21 + by PCR
2021-22 + by PCR
Current week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 8
Laboratory Surveillance
The MN Lab System (MLS) Laboratory Influenza Surveillance Program is made up of more than 310 clinic- and hospital-based laboratories voluntarily submitting testing data weekly These laboratories perform rapid testing for influenza and Respiratory Syncytial Virus (RSV) Significantly fewer labs perform PCR testing for influenza and three also perform PCR testing for other respiratory viruses MDH-PHL provides further characterization of submitted influenza isolates to determine the hemagglutinin serotype to indicate vaccine coverage Tracking the laboratory results assists healthcare providers with patient diagnosis of influenza-like illness and provides an indicator of the progression of the influenza season as well as prevalence of disease in the community
Specimens Positive for Influenza by Molecular Testing by Week
of molecular tests positive this week of molecular tests positive last week
01 01
Beginning in 2016-17 laboratories report results for rapid molecular influenza tests in addition to RT-PCR results
dagger The Week 53 value for these seasons is the average of Week 52 and Week 1
Region AB+ A+ B+ dagger2015-16 + dagger2016-17 + dagger2017-18 + dagger2018-19 + dagger2019-20 + 2020-21 +
40 0 0 0 203 036 1145 103448 0 0
41 0 1 2 072 22 0715 232558 4 23
42 0 1 4 170 203 2916 221239 18 27
43 524 187 16344 18 12
44 196 172 2489 316742 11
45 192 347 08658 468948 32
46 240 485 315501 601589 07
47 460 734 332 95373 34
48 600 113 2247 127993 21
49 501 1109 199336 152819 31
50 788 1562 260869 237288 18
51 934 2187 405872 284537 0
52 1325 3006 919143 311344 18
53 12675 28255 8677865 2940235 265
1 1210 2645 81643 276703 081
2 1338 2899 134066 262082 22
3 1865 3389 167612 312544 0
4 2269 3316 227335 330813 0
5 2427 3239 254458 359291 28
6 2696 271 249393 360528 0
7 3081 2975 28238 368231 574
8 2756 2987 287495 342097 221
9 2689 2712 297446 350487 233
10 2990 2243 315927 309389 0
11 3028 2194 338757 226124 079
12 3082 1891 281729 136591 109
13 2704 1984 253886 407303 159
14 2369 1648 224849 188442 408
15 2180 1771 21995 219178 122
16 1810 172 149654 134771 0
17 1074 1679 149688 104167 175
18 900 148 14718 181818 159
19 980 983 137681 714
20 775 886 133891 0
Region Number + dagger2016-17 + dagger2017-18 + dagger2018-19 + dagger2019-20 + 2020-21+
40 56 1304 1489 810811 91 21
41 106 10 1327 625 10 36
42 72 65 7 493827 158 348
43 96 6767 123711 13
44 93 20408 208333 33
45 91 12381 894309 0
46 25 196429 155844 0
47 241 2227 281633 0
48 2949 29787 237013 77
49 2601 364 26378 0
50 3205 372881 251724 0
51 4051 350133 26824 59
52 3767 324009 291747 0
53 3581 358621 319404 714
1 313 37844 245742 0
2 3291 320833 262443 0
3 3006 320366 201729 105
4 3211 255937 228261 0
5 3043 304094 235474 0
6 2667 29683 190736 0
7 3041 206997 211144 435
8 2248 183871 169675 0
9 2283 214925 142857 0
10 2627 1512 881543 0
11 873 1666667 102881 0
12 1186 179916 48346 0
13 1603 115555 205882 0
14 909 903226 204082 333
15 583 958904 30303 0
16 735 34247 263158 769
17 411 84033 181818 0
18 8 289855 0
19 15 322581 454
20 1 57 15 322581 454
0
5
10
15
20
25
30
35
40
45
50
0
2
4
6
8
10
12
14
16
18
20
40 42 44 46 48 50 52 1 3 5 7 9 11 13 15 17 19
Percentage of Rapid Antigen Influenza Tests Positive
Num
ber o
f Pos
itive
Influ
enza
Spe
cim
ens
MMWR Week
AB+ A+B+ 2016-17 +2017-18 + 2018-19 +2019-20 + 2020-21 +
Current week
0
10
20
30
40
50
60
70
80
90
100
0
25
50
75
100
125
150
175
200
225
250
275
300
40 42 44 46 48 50 52 2 4 6 8 10 12 14 16 18 20
Percentage of Rapid Antigen RSV Tests Positive
Num
ber o
f Pos
itive
RSV
Tes
ts
MMWR Week
Number +
2017-18 +
2018-19 +
2019-20 +
2020-21+
2021-22+
Current week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 9
Laboratory Surveillance (continued)MLS Laboratories ndash Influenza Testing
Specimens Positive by Influenza Rapid Antigen Test by WeekMLS Laboratories ndash RSV Testing
Specimens Positive by RSV Rapid Antigen Test by Week
Region rapid antigen influenza tests + this week
Central 1
Metro 3
Northeast 0
Northwest 0
South Central 6
Southeast 0
Southwest 0
West Central 0
Statewide (overall) 3
Region rapid antigen RSV tests + this week
Central 30
Metro 25
Northeast 0
Northwest 33
South Central 49
Southeast 37
Southwest 35
West Central 35
Statewide (overall) 35dagger The Week 53 value for these seasons is the average of Week 52 and Week 1
Week COVID-positive Flu-positive RSV-positive Other-pathogen positive All tests negative
40 0 0 5 9 28
41 5 0 0 0 17
42 2 0 0 0 13
43
44
45
46
47
48
49
50
51
52
53
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
0
10
20
30
40
50
60
40 41 42 43 44 45 46 47 48 49 50 51 52 53 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Num
ber P
ositi
ve b
y RT
-PCR
MMWR Week
COVID-positive Flu-positive RSV-positive Other-pathogen positive All tests negative
Current week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 10
Minnesota Influenza Incidence Surveillance Project (MIISP)
MIISP surveillance sites collect 10-20 specimens every week on patients presenting with acute respiratory illness with or without fever The graph below illustrate the number of positive results by virus family detected each week The primary purpose of these graphs is to visualize the respiratory viruses circulating in Minnesota
MIISP Testing (Outpatient) by Week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 11
Minnesota Influenza Incidence Surveillance Project (continued)
Pathogen Group Pathogen Frequency Percent of detections
All Negative None 58
Adenovirus Adenovirus 1 5
Bocavirus Bocavirus - -
Influenza Flu AH12009 - -
Flu AH1seasonal - -
Flu AH3 - -
Flu AUnknown - -
Flu AUnsubtypeable - -
Flu B - -
Parainfluenza Parainfluenza-1 - -
Parainfluenza-2 - -
Parainfluenza-3 - -
Parainfluenza-4 - -
RSVMetapneumovirus Metapneumovirus - -
RSV 5 24
Seasonal Coronavirus Coronavirus-229E - -
Coronavirus-HKU1 - -
Coronavirus-NL63 - -
Coronavirus-OC43 - -
RhinovirusEnterovirus Enterovirus - -
Rhinovirus - -
RhinovirusEnterovirus (non-differentiated) 8 38
SARS-CoV-2 (COVID-19) SARS-CoV-2 7 33
This table details the specific viruses detected during the 2020-21 Influenza season Viruses are grouped by the virus family they belong to with the exception of SARS-CoV-2 (the virus that causes COVID-19) which is singled out from the seasonal coronaviruses that regularly circulate throughout the year
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 12
Weekly US Influenza Surveillance Report
Week 41 ending Oct 16 2021Seasonal influenza activity in the United States remains lowbull An annual flu vaccine is the best way to protect against flu and its potentially serious complicationsbull CDC recommends everyone 6 months or older get a flu vaccine by the end of Octoberbull There also are flu antiviral drugs that can be used to treat flu illness
Outpatient Illness ILINet Activity Map
This week 2 jurisdictions experienced moderate activity and no jurisdictions experienced high or very high activity
CDC National Influenza Surveillance (httpwwwcdcgovfluweekly)
- Hospitalized Influenza Surveillance
- Influenza-Associated Death Surveillance
- Respiratory Disease Outbreak Surveillance School Outbreaks
- Respiratory Disease Outbreak Surveillance LTC Outbreaks
- Sentinel Provider Surveillance (Outpatients)
- Laboratory Surveillance
- Minnesota Influenza Incidence Surveillance Project (MIISP)
- Weekly US Influenza Surveillance Report
-
Week 2016-17dagger 2017-18dagger 2018-19dagger 2019-20dagger 2020-21 2020-21 MN BaselineDagger
40 143 128562 242367 066 13 28
41 143 171591 233836 087 106 28
42 142 139559 221124 073 8800 28
43 124 153928 239513 05 28
44 137 224719 240882 055 28
45 142 175836 227738 07 28
46 164 184595 243498 065 28
47 166 220573 272668 05 28
48 147 208246 405946 042 28
49 215 189865 352987 033 28
50 23 267372 353594 025 28
51 294 258014 565083 014 28
52 364 340117 971059 012 28
53 423 327022 37 024 28
1 506 474847 36 017 28
2 581 321409 33 018 28
3 632 379504 39 028 28
4 646 377994 48 046 28
5 673 325786 54 023 28
6 569 34634 64 03 28
7 533 372245 52 027 28
8 447 33982 54 035 28
9 376 359236 52 027 28
10 298 356018 44 043 28
11 239 303359 36 033 28
12 233 228605 23 035 28
13 166 241452 22 036 28
14 209 22887 16 042 28
15 218 214939 13 042 28
16 165 245684 15 047 28
17 176 215866 16 045 28
18 168 18928 19 043 28
19 14 231566 1 068 28
20
0
2
4
6
8
10
12
40 41 42 43 44 45 46 47 48 49 50 51 52 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Perc
ent w
ith In
fluen
za-li
ke Il
lnes
s
MMWR Week
2017-18
2018-19
2019-20
2020-21
2021-22
Pre-pandemic MN Baselinedagger
Current week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 7
Sentinel Provider Surveillance (Outpatients)
MDH collaborates with healthcare providers who report the total number of patients seen and the total number of those patients presenting to outpatient clinics with influenza-like illness
Percentage of Persons Presenting to Outpatient Clinics with Influenza-Like Illness (ILI)
of outpatients with ILI this week of outpatients with ILI last week
09 11
Indicates current week-data may be delayed by 1 or more weeks dagger The Week 53 value for these seasons is the average of Week 52 and Week 1Dagger MN Baseline valid for 2020-21 season only do not compare it with previous seasons The baseline is
calculated by averaging the ILI percent for non-influenza weeks over the previous four seasons and adding two standard deviations Non-influenza weeks account for less than 2 of the seasonrsquos total flu-positive specimens tested at Public Health Labs in HHS Region 5 Weeks where ILI is above baseline reflect weeks with excess health care visits due to ILI
Week A (H1N1) pdm09 A H3 A (not subtyped) B 2016-17 + by PCR 2017-18 + by PCR 2018-19 + by PCR 2019-20 + by PCR 2020-21 + by PCR
40 3 1 025 0 013175 0 013
41 1 2 019 0123 034247 06 01
42 0 1 0 1 129 0898 095238 03 0108
43 078 06924 202899 0
44 174 1139 137112 02
45 351 03525 332577 0
46 482 034404 331263 01
47 633 047733 859206 01
48 61 10506 992443 0
49 557 06435 116883 01
50 1063 200222 173616 003
51 2219 38961 25333 01
52 2662 6875 287995 01
53 2373 689858 247537 0
1 2608 8645 238247 009
2 3128 11334 291924 0
3 2973 15812 285285 016
4 256 198343 313398 006
5 2463 219485 330324 0
6 2433 257567 359588 0065
7 229 260141 341712 0073
8 2105 255621 354538 0
9 1938 267438 277136 018
10 1745 239014 22092 0
11 1801 224066 928172 012
12 1689 1891 510657 0
13 1711 192825 105079 0
14 1463 105078 0 0045
15 1132 887902 0 0
16 144 743062 0 0
17 1196 554455 0 0
18 529 481348 0 0
19 538 441176 0
0
0
5
10
15
20
25
30
35
40
45
50
0
5
10
15
20
25
30
40 41 42 43 44 45 46 47 48 49 50 51 52 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Percent of Positive Molecular TestsN
umbe
r of P
ositi
ve M
olec
ular
Tes
ts
MMWR Week
B
A (not subtyped)
A H3
A (H1N1) pdm09
2017-18 + by PCR
2018-19 + by PCR
2019-20 + by PCR
2020-21 + by PCR
2021-22 + by PCR
Current week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 8
Laboratory Surveillance
The MN Lab System (MLS) Laboratory Influenza Surveillance Program is made up of more than 310 clinic- and hospital-based laboratories voluntarily submitting testing data weekly These laboratories perform rapid testing for influenza and Respiratory Syncytial Virus (RSV) Significantly fewer labs perform PCR testing for influenza and three also perform PCR testing for other respiratory viruses MDH-PHL provides further characterization of submitted influenza isolates to determine the hemagglutinin serotype to indicate vaccine coverage Tracking the laboratory results assists healthcare providers with patient diagnosis of influenza-like illness and provides an indicator of the progression of the influenza season as well as prevalence of disease in the community
Specimens Positive for Influenza by Molecular Testing by Week
of molecular tests positive this week of molecular tests positive last week
01 01
Beginning in 2016-17 laboratories report results for rapid molecular influenza tests in addition to RT-PCR results
dagger The Week 53 value for these seasons is the average of Week 52 and Week 1
Region AB+ A+ B+ dagger2015-16 + dagger2016-17 + dagger2017-18 + dagger2018-19 + dagger2019-20 + 2020-21 +
40 0 0 0 203 036 1145 103448 0 0
41 0 1 2 072 22 0715 232558 4 23
42 0 1 4 170 203 2916 221239 18 27
43 524 187 16344 18 12
44 196 172 2489 316742 11
45 192 347 08658 468948 32
46 240 485 315501 601589 07
47 460 734 332 95373 34
48 600 113 2247 127993 21
49 501 1109 199336 152819 31
50 788 1562 260869 237288 18
51 934 2187 405872 284537 0
52 1325 3006 919143 311344 18
53 12675 28255 8677865 2940235 265
1 1210 2645 81643 276703 081
2 1338 2899 134066 262082 22
3 1865 3389 167612 312544 0
4 2269 3316 227335 330813 0
5 2427 3239 254458 359291 28
6 2696 271 249393 360528 0
7 3081 2975 28238 368231 574
8 2756 2987 287495 342097 221
9 2689 2712 297446 350487 233
10 2990 2243 315927 309389 0
11 3028 2194 338757 226124 079
12 3082 1891 281729 136591 109
13 2704 1984 253886 407303 159
14 2369 1648 224849 188442 408
15 2180 1771 21995 219178 122
16 1810 172 149654 134771 0
17 1074 1679 149688 104167 175
18 900 148 14718 181818 159
19 980 983 137681 714
20 775 886 133891 0
Region Number + dagger2016-17 + dagger2017-18 + dagger2018-19 + dagger2019-20 + 2020-21+
40 56 1304 1489 810811 91 21
41 106 10 1327 625 10 36
42 72 65 7 493827 158 348
43 96 6767 123711 13
44 93 20408 208333 33
45 91 12381 894309 0
46 25 196429 155844 0
47 241 2227 281633 0
48 2949 29787 237013 77
49 2601 364 26378 0
50 3205 372881 251724 0
51 4051 350133 26824 59
52 3767 324009 291747 0
53 3581 358621 319404 714
1 313 37844 245742 0
2 3291 320833 262443 0
3 3006 320366 201729 105
4 3211 255937 228261 0
5 3043 304094 235474 0
6 2667 29683 190736 0
7 3041 206997 211144 435
8 2248 183871 169675 0
9 2283 214925 142857 0
10 2627 1512 881543 0
11 873 1666667 102881 0
12 1186 179916 48346 0
13 1603 115555 205882 0
14 909 903226 204082 333
15 583 958904 30303 0
16 735 34247 263158 769
17 411 84033 181818 0
18 8 289855 0
19 15 322581 454
20 1 57 15 322581 454
0
5
10
15
20
25
30
35
40
45
50
0
2
4
6
8
10
12
14
16
18
20
40 42 44 46 48 50 52 1 3 5 7 9 11 13 15 17 19
Percentage of Rapid Antigen Influenza Tests Positive
Num
ber o
f Pos
itive
Influ
enza
Spe
cim
ens
MMWR Week
AB+ A+B+ 2016-17 +2017-18 + 2018-19 +2019-20 + 2020-21 +
Current week
0
10
20
30
40
50
60
70
80
90
100
0
25
50
75
100
125
150
175
200
225
250
275
300
40 42 44 46 48 50 52 2 4 6 8 10 12 14 16 18 20
Percentage of Rapid Antigen RSV Tests Positive
Num
ber o
f Pos
itive
RSV
Tes
ts
MMWR Week
Number +
2017-18 +
2018-19 +
2019-20 +
2020-21+
2021-22+
Current week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 9
Laboratory Surveillance (continued)MLS Laboratories ndash Influenza Testing
Specimens Positive by Influenza Rapid Antigen Test by WeekMLS Laboratories ndash RSV Testing
Specimens Positive by RSV Rapid Antigen Test by Week
Region rapid antigen influenza tests + this week
Central 1
Metro 3
Northeast 0
Northwest 0
South Central 6
Southeast 0
Southwest 0
West Central 0
Statewide (overall) 3
Region rapid antigen RSV tests + this week
Central 30
Metro 25
Northeast 0
Northwest 33
South Central 49
Southeast 37
Southwest 35
West Central 35
Statewide (overall) 35dagger The Week 53 value for these seasons is the average of Week 52 and Week 1
Week COVID-positive Flu-positive RSV-positive Other-pathogen positive All tests negative
40 0 0 5 9 28
41 5 0 0 0 17
42 2 0 0 0 13
43
44
45
46
47
48
49
50
51
52
53
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
0
10
20
30
40
50
60
40 41 42 43 44 45 46 47 48 49 50 51 52 53 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Num
ber P
ositi
ve b
y RT
-PCR
MMWR Week
COVID-positive Flu-positive RSV-positive Other-pathogen positive All tests negative
Current week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 10
Minnesota Influenza Incidence Surveillance Project (MIISP)
MIISP surveillance sites collect 10-20 specimens every week on patients presenting with acute respiratory illness with or without fever The graph below illustrate the number of positive results by virus family detected each week The primary purpose of these graphs is to visualize the respiratory viruses circulating in Minnesota
MIISP Testing (Outpatient) by Week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 11
Minnesota Influenza Incidence Surveillance Project (continued)
Pathogen Group Pathogen Frequency Percent of detections
All Negative None 58
Adenovirus Adenovirus 1 5
Bocavirus Bocavirus - -
Influenza Flu AH12009 - -
Flu AH1seasonal - -
Flu AH3 - -
Flu AUnknown - -
Flu AUnsubtypeable - -
Flu B - -
Parainfluenza Parainfluenza-1 - -
Parainfluenza-2 - -
Parainfluenza-3 - -
Parainfluenza-4 - -
RSVMetapneumovirus Metapneumovirus - -
RSV 5 24
Seasonal Coronavirus Coronavirus-229E - -
Coronavirus-HKU1 - -
Coronavirus-NL63 - -
Coronavirus-OC43 - -
RhinovirusEnterovirus Enterovirus - -
Rhinovirus - -
RhinovirusEnterovirus (non-differentiated) 8 38
SARS-CoV-2 (COVID-19) SARS-CoV-2 7 33
This table details the specific viruses detected during the 2020-21 Influenza season Viruses are grouped by the virus family they belong to with the exception of SARS-CoV-2 (the virus that causes COVID-19) which is singled out from the seasonal coronaviruses that regularly circulate throughout the year
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 12
Weekly US Influenza Surveillance Report
Week 41 ending Oct 16 2021Seasonal influenza activity in the United States remains lowbull An annual flu vaccine is the best way to protect against flu and its potentially serious complicationsbull CDC recommends everyone 6 months or older get a flu vaccine by the end of Octoberbull There also are flu antiviral drugs that can be used to treat flu illness
Outpatient Illness ILINet Activity Map
This week 2 jurisdictions experienced moderate activity and no jurisdictions experienced high or very high activity
CDC National Influenza Surveillance (httpwwwcdcgovfluweekly)
- Hospitalized Influenza Surveillance
- Influenza-Associated Death Surveillance
- Respiratory Disease Outbreak Surveillance School Outbreaks
- Respiratory Disease Outbreak Surveillance LTC Outbreaks
- Sentinel Provider Surveillance (Outpatients)
- Laboratory Surveillance
- Minnesota Influenza Incidence Surveillance Project (MIISP)
- Weekly US Influenza Surveillance Report
-
Week A (H1N1) pdm09 A H3 A (not subtyped) B 2016-17 + by PCR 2017-18 + by PCR 2018-19 + by PCR 2019-20 + by PCR 2020-21 + by PCR
40 3 1 025 0 013175 0 013
41 1 2 019 0123 034247 06 01
42 0 1 0 1 129 0898 095238 03 0108
43 078 06924 202899 0
44 174 1139 137112 02
45 351 03525 332577 0
46 482 034404 331263 01
47 633 047733 859206 01
48 61 10506 992443 0
49 557 06435 116883 01
50 1063 200222 173616 003
51 2219 38961 25333 01
52 2662 6875 287995 01
53 2373 689858 247537 0
1 2608 8645 238247 009
2 3128 11334 291924 0
3 2973 15812 285285 016
4 256 198343 313398 006
5 2463 219485 330324 0
6 2433 257567 359588 0065
7 229 260141 341712 0073
8 2105 255621 354538 0
9 1938 267438 277136 018
10 1745 239014 22092 0
11 1801 224066 928172 012
12 1689 1891 510657 0
13 1711 192825 105079 0
14 1463 105078 0 0045
15 1132 887902 0 0
16 144 743062 0 0
17 1196 554455 0 0
18 529 481348 0 0
19 538 441176 0
0
0
5
10
15
20
25
30
35
40
45
50
0
5
10
15
20
25
30
40 41 42 43 44 45 46 47 48 49 50 51 52 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Percent of Positive Molecular TestsN
umbe
r of P
ositi
ve M
olec
ular
Tes
ts
MMWR Week
B
A (not subtyped)
A H3
A (H1N1) pdm09
2017-18 + by PCR
2018-19 + by PCR
2019-20 + by PCR
2020-21 + by PCR
2021-22 + by PCR
Current week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 8
Laboratory Surveillance
The MN Lab System (MLS) Laboratory Influenza Surveillance Program is made up of more than 310 clinic- and hospital-based laboratories voluntarily submitting testing data weekly These laboratories perform rapid testing for influenza and Respiratory Syncytial Virus (RSV) Significantly fewer labs perform PCR testing for influenza and three also perform PCR testing for other respiratory viruses MDH-PHL provides further characterization of submitted influenza isolates to determine the hemagglutinin serotype to indicate vaccine coverage Tracking the laboratory results assists healthcare providers with patient diagnosis of influenza-like illness and provides an indicator of the progression of the influenza season as well as prevalence of disease in the community
Specimens Positive for Influenza by Molecular Testing by Week
of molecular tests positive this week of molecular tests positive last week
01 01
Beginning in 2016-17 laboratories report results for rapid molecular influenza tests in addition to RT-PCR results
dagger The Week 53 value for these seasons is the average of Week 52 and Week 1
Region AB+ A+ B+ dagger2015-16 + dagger2016-17 + dagger2017-18 + dagger2018-19 + dagger2019-20 + 2020-21 +
40 0 0 0 203 036 1145 103448 0 0
41 0 1 2 072 22 0715 232558 4 23
42 0 1 4 170 203 2916 221239 18 27
43 524 187 16344 18 12
44 196 172 2489 316742 11
45 192 347 08658 468948 32
46 240 485 315501 601589 07
47 460 734 332 95373 34
48 600 113 2247 127993 21
49 501 1109 199336 152819 31
50 788 1562 260869 237288 18
51 934 2187 405872 284537 0
52 1325 3006 919143 311344 18
53 12675 28255 8677865 2940235 265
1 1210 2645 81643 276703 081
2 1338 2899 134066 262082 22
3 1865 3389 167612 312544 0
4 2269 3316 227335 330813 0
5 2427 3239 254458 359291 28
6 2696 271 249393 360528 0
7 3081 2975 28238 368231 574
8 2756 2987 287495 342097 221
9 2689 2712 297446 350487 233
10 2990 2243 315927 309389 0
11 3028 2194 338757 226124 079
12 3082 1891 281729 136591 109
13 2704 1984 253886 407303 159
14 2369 1648 224849 188442 408
15 2180 1771 21995 219178 122
16 1810 172 149654 134771 0
17 1074 1679 149688 104167 175
18 900 148 14718 181818 159
19 980 983 137681 714
20 775 886 133891 0
Region Number + dagger2016-17 + dagger2017-18 + dagger2018-19 + dagger2019-20 + 2020-21+
40 56 1304 1489 810811 91 21
41 106 10 1327 625 10 36
42 72 65 7 493827 158 348
43 96 6767 123711 13
44 93 20408 208333 33
45 91 12381 894309 0
46 25 196429 155844 0
47 241 2227 281633 0
48 2949 29787 237013 77
49 2601 364 26378 0
50 3205 372881 251724 0
51 4051 350133 26824 59
52 3767 324009 291747 0
53 3581 358621 319404 714
1 313 37844 245742 0
2 3291 320833 262443 0
3 3006 320366 201729 105
4 3211 255937 228261 0
5 3043 304094 235474 0
6 2667 29683 190736 0
7 3041 206997 211144 435
8 2248 183871 169675 0
9 2283 214925 142857 0
10 2627 1512 881543 0
11 873 1666667 102881 0
12 1186 179916 48346 0
13 1603 115555 205882 0
14 909 903226 204082 333
15 583 958904 30303 0
16 735 34247 263158 769
17 411 84033 181818 0
18 8 289855 0
19 15 322581 454
20 1 57 15 322581 454
0
5
10
15
20
25
30
35
40
45
50
0
2
4
6
8
10
12
14
16
18
20
40 42 44 46 48 50 52 1 3 5 7 9 11 13 15 17 19
Percentage of Rapid Antigen Influenza Tests Positive
Num
ber o
f Pos
itive
Influ
enza
Spe
cim
ens
MMWR Week
AB+ A+B+ 2016-17 +2017-18 + 2018-19 +2019-20 + 2020-21 +
Current week
0
10
20
30
40
50
60
70
80
90
100
0
25
50
75
100
125
150
175
200
225
250
275
300
40 42 44 46 48 50 52 2 4 6 8 10 12 14 16 18 20
Percentage of Rapid Antigen RSV Tests Positive
Num
ber o
f Pos
itive
RSV
Tes
ts
MMWR Week
Number +
2017-18 +
2018-19 +
2019-20 +
2020-21+
2021-22+
Current week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 9
Laboratory Surveillance (continued)MLS Laboratories ndash Influenza Testing
Specimens Positive by Influenza Rapid Antigen Test by WeekMLS Laboratories ndash RSV Testing
Specimens Positive by RSV Rapid Antigen Test by Week
Region rapid antigen influenza tests + this week
Central 1
Metro 3
Northeast 0
Northwest 0
South Central 6
Southeast 0
Southwest 0
West Central 0
Statewide (overall) 3
Region rapid antigen RSV tests + this week
Central 30
Metro 25
Northeast 0
Northwest 33
South Central 49
Southeast 37
Southwest 35
West Central 35
Statewide (overall) 35dagger The Week 53 value for these seasons is the average of Week 52 and Week 1
Week COVID-positive Flu-positive RSV-positive Other-pathogen positive All tests negative
40 0 0 5 9 28
41 5 0 0 0 17
42 2 0 0 0 13
43
44
45
46
47
48
49
50
51
52
53
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
0
10
20
30
40
50
60
40 41 42 43 44 45 46 47 48 49 50 51 52 53 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Num
ber P
ositi
ve b
y RT
-PCR
MMWR Week
COVID-positive Flu-positive RSV-positive Other-pathogen positive All tests negative
Current week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 10
Minnesota Influenza Incidence Surveillance Project (MIISP)
MIISP surveillance sites collect 10-20 specimens every week on patients presenting with acute respiratory illness with or without fever The graph below illustrate the number of positive results by virus family detected each week The primary purpose of these graphs is to visualize the respiratory viruses circulating in Minnesota
MIISP Testing (Outpatient) by Week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 11
Minnesota Influenza Incidence Surveillance Project (continued)
Pathogen Group Pathogen Frequency Percent of detections
All Negative None 58
Adenovirus Adenovirus 1 5
Bocavirus Bocavirus - -
Influenza Flu AH12009 - -
Flu AH1seasonal - -
Flu AH3 - -
Flu AUnknown - -
Flu AUnsubtypeable - -
Flu B - -
Parainfluenza Parainfluenza-1 - -
Parainfluenza-2 - -
Parainfluenza-3 - -
Parainfluenza-4 - -
RSVMetapneumovirus Metapneumovirus - -
RSV 5 24
Seasonal Coronavirus Coronavirus-229E - -
Coronavirus-HKU1 - -
Coronavirus-NL63 - -
Coronavirus-OC43 - -
RhinovirusEnterovirus Enterovirus - -
Rhinovirus - -
RhinovirusEnterovirus (non-differentiated) 8 38
SARS-CoV-2 (COVID-19) SARS-CoV-2 7 33
This table details the specific viruses detected during the 2020-21 Influenza season Viruses are grouped by the virus family they belong to with the exception of SARS-CoV-2 (the virus that causes COVID-19) which is singled out from the seasonal coronaviruses that regularly circulate throughout the year
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 12
Weekly US Influenza Surveillance Report
Week 41 ending Oct 16 2021Seasonal influenza activity in the United States remains lowbull An annual flu vaccine is the best way to protect against flu and its potentially serious complicationsbull CDC recommends everyone 6 months or older get a flu vaccine by the end of Octoberbull There also are flu antiviral drugs that can be used to treat flu illness
Outpatient Illness ILINet Activity Map
This week 2 jurisdictions experienced moderate activity and no jurisdictions experienced high or very high activity
CDC National Influenza Surveillance (httpwwwcdcgovfluweekly)
- Hospitalized Influenza Surveillance
- Influenza-Associated Death Surveillance
- Respiratory Disease Outbreak Surveillance School Outbreaks
- Respiratory Disease Outbreak Surveillance LTC Outbreaks
- Sentinel Provider Surveillance (Outpatients)
- Laboratory Surveillance
- Minnesota Influenza Incidence Surveillance Project (MIISP)
- Weekly US Influenza Surveillance Report
-
Region AB+ A+ B+ dagger2015-16 + dagger2016-17 + dagger2017-18 + dagger2018-19 + dagger2019-20 + 2020-21 +
40 0 0 0 203 036 1145 103448 0 0
41 0 1 2 072 22 0715 232558 4 23
42 0 1 4 170 203 2916 221239 18 27
43 524 187 16344 18 12
44 196 172 2489 316742 11
45 192 347 08658 468948 32
46 240 485 315501 601589 07
47 460 734 332 95373 34
48 600 113 2247 127993 21
49 501 1109 199336 152819 31
50 788 1562 260869 237288 18
51 934 2187 405872 284537 0
52 1325 3006 919143 311344 18
53 12675 28255 8677865 2940235 265
1 1210 2645 81643 276703 081
2 1338 2899 134066 262082 22
3 1865 3389 167612 312544 0
4 2269 3316 227335 330813 0
5 2427 3239 254458 359291 28
6 2696 271 249393 360528 0
7 3081 2975 28238 368231 574
8 2756 2987 287495 342097 221
9 2689 2712 297446 350487 233
10 2990 2243 315927 309389 0
11 3028 2194 338757 226124 079
12 3082 1891 281729 136591 109
13 2704 1984 253886 407303 159
14 2369 1648 224849 188442 408
15 2180 1771 21995 219178 122
16 1810 172 149654 134771 0
17 1074 1679 149688 104167 175
18 900 148 14718 181818 159
19 980 983 137681 714
20 775 886 133891 0
Region Number + dagger2016-17 + dagger2017-18 + dagger2018-19 + dagger2019-20 + 2020-21+
40 56 1304 1489 810811 91 21
41 106 10 1327 625 10 36
42 72 65 7 493827 158 348
43 96 6767 123711 13
44 93 20408 208333 33
45 91 12381 894309 0
46 25 196429 155844 0
47 241 2227 281633 0
48 2949 29787 237013 77
49 2601 364 26378 0
50 3205 372881 251724 0
51 4051 350133 26824 59
52 3767 324009 291747 0
53 3581 358621 319404 714
1 313 37844 245742 0
2 3291 320833 262443 0
3 3006 320366 201729 105
4 3211 255937 228261 0
5 3043 304094 235474 0
6 2667 29683 190736 0
7 3041 206997 211144 435
8 2248 183871 169675 0
9 2283 214925 142857 0
10 2627 1512 881543 0
11 873 1666667 102881 0
12 1186 179916 48346 0
13 1603 115555 205882 0
14 909 903226 204082 333
15 583 958904 30303 0
16 735 34247 263158 769
17 411 84033 181818 0
18 8 289855 0
19 15 322581 454
20 1 57 15 322581 454
0
5
10
15
20
25
30
35
40
45
50
0
2
4
6
8
10
12
14
16
18
20
40 42 44 46 48 50 52 1 3 5 7 9 11 13 15 17 19
Percentage of Rapid Antigen Influenza Tests Positive
Num
ber o
f Pos
itive
Influ
enza
Spe
cim
ens
MMWR Week
AB+ A+B+ 2016-17 +2017-18 + 2018-19 +2019-20 + 2020-21 +
Current week
0
10
20
30
40
50
60
70
80
90
100
0
25
50
75
100
125
150
175
200
225
250
275
300
40 42 44 46 48 50 52 2 4 6 8 10 12 14 16 18 20
Percentage of Rapid Antigen RSV Tests Positive
Num
ber o
f Pos
itive
RSV
Tes
ts
MMWR Week
Number +
2017-18 +
2018-19 +
2019-20 +
2020-21+
2021-22+
Current week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 9
Laboratory Surveillance (continued)MLS Laboratories ndash Influenza Testing
Specimens Positive by Influenza Rapid Antigen Test by WeekMLS Laboratories ndash RSV Testing
Specimens Positive by RSV Rapid Antigen Test by Week
Region rapid antigen influenza tests + this week
Central 1
Metro 3
Northeast 0
Northwest 0
South Central 6
Southeast 0
Southwest 0
West Central 0
Statewide (overall) 3
Region rapid antigen RSV tests + this week
Central 30
Metro 25
Northeast 0
Northwest 33
South Central 49
Southeast 37
Southwest 35
West Central 35
Statewide (overall) 35dagger The Week 53 value for these seasons is the average of Week 52 and Week 1
Week COVID-positive Flu-positive RSV-positive Other-pathogen positive All tests negative
40 0 0 5 9 28
41 5 0 0 0 17
42 2 0 0 0 13
43
44
45
46
47
48
49
50
51
52
53
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
0
10
20
30
40
50
60
40 41 42 43 44 45 46 47 48 49 50 51 52 53 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Num
ber P
ositi
ve b
y RT
-PCR
MMWR Week
COVID-positive Flu-positive RSV-positive Other-pathogen positive All tests negative
Current week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 10
Minnesota Influenza Incidence Surveillance Project (MIISP)
MIISP surveillance sites collect 10-20 specimens every week on patients presenting with acute respiratory illness with or without fever The graph below illustrate the number of positive results by virus family detected each week The primary purpose of these graphs is to visualize the respiratory viruses circulating in Minnesota
MIISP Testing (Outpatient) by Week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 11
Minnesota Influenza Incidence Surveillance Project (continued)
Pathogen Group Pathogen Frequency Percent of detections
All Negative None 58
Adenovirus Adenovirus 1 5
Bocavirus Bocavirus - -
Influenza Flu AH12009 - -
Flu AH1seasonal - -
Flu AH3 - -
Flu AUnknown - -
Flu AUnsubtypeable - -
Flu B - -
Parainfluenza Parainfluenza-1 - -
Parainfluenza-2 - -
Parainfluenza-3 - -
Parainfluenza-4 - -
RSVMetapneumovirus Metapneumovirus - -
RSV 5 24
Seasonal Coronavirus Coronavirus-229E - -
Coronavirus-HKU1 - -
Coronavirus-NL63 - -
Coronavirus-OC43 - -
RhinovirusEnterovirus Enterovirus - -
Rhinovirus - -
RhinovirusEnterovirus (non-differentiated) 8 38
SARS-CoV-2 (COVID-19) SARS-CoV-2 7 33
This table details the specific viruses detected during the 2020-21 Influenza season Viruses are grouped by the virus family they belong to with the exception of SARS-CoV-2 (the virus that causes COVID-19) which is singled out from the seasonal coronaviruses that regularly circulate throughout the year
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 12
Weekly US Influenza Surveillance Report
Week 41 ending Oct 16 2021Seasonal influenza activity in the United States remains lowbull An annual flu vaccine is the best way to protect against flu and its potentially serious complicationsbull CDC recommends everyone 6 months or older get a flu vaccine by the end of Octoberbull There also are flu antiviral drugs that can be used to treat flu illness
Outpatient Illness ILINet Activity Map
This week 2 jurisdictions experienced moderate activity and no jurisdictions experienced high or very high activity
CDC National Influenza Surveillance (httpwwwcdcgovfluweekly)
- Hospitalized Influenza Surveillance
- Influenza-Associated Death Surveillance
- Respiratory Disease Outbreak Surveillance School Outbreaks
- Respiratory Disease Outbreak Surveillance LTC Outbreaks
- Sentinel Provider Surveillance (Outpatients)
- Laboratory Surveillance
- Minnesota Influenza Incidence Surveillance Project (MIISP)
- Weekly US Influenza Surveillance Report
-
Week COVID-positive Flu-positive RSV-positive Other-pathogen positive All tests negative
40 0 0 5 9 28
41 5 0 0 0 17
42 2 0 0 0 13
43
44
45
46
47
48
49
50
51
52
53
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
0
10
20
30
40
50
60
40 41 42 43 44 45 46 47 48 49 50 51 52 53 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Num
ber P
ositi
ve b
y RT
-PCR
MMWR Week
COVID-positive Flu-positive RSV-positive Other-pathogen positive All tests negative
Current week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 10
Minnesota Influenza Incidence Surveillance Project (MIISP)
MIISP surveillance sites collect 10-20 specimens every week on patients presenting with acute respiratory illness with or without fever The graph below illustrate the number of positive results by virus family detected each week The primary purpose of these graphs is to visualize the respiratory viruses circulating in Minnesota
MIISP Testing (Outpatient) by Week
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 11
Minnesota Influenza Incidence Surveillance Project (continued)
Pathogen Group Pathogen Frequency Percent of detections
All Negative None 58
Adenovirus Adenovirus 1 5
Bocavirus Bocavirus - -
Influenza Flu AH12009 - -
Flu AH1seasonal - -
Flu AH3 - -
Flu AUnknown - -
Flu AUnsubtypeable - -
Flu B - -
Parainfluenza Parainfluenza-1 - -
Parainfluenza-2 - -
Parainfluenza-3 - -
Parainfluenza-4 - -
RSVMetapneumovirus Metapneumovirus - -
RSV 5 24
Seasonal Coronavirus Coronavirus-229E - -
Coronavirus-HKU1 - -
Coronavirus-NL63 - -
Coronavirus-OC43 - -
RhinovirusEnterovirus Enterovirus - -
Rhinovirus - -
RhinovirusEnterovirus (non-differentiated) 8 38
SARS-CoV-2 (COVID-19) SARS-CoV-2 7 33
This table details the specific viruses detected during the 2020-21 Influenza season Viruses are grouped by the virus family they belong to with the exception of SARS-CoV-2 (the virus that causes COVID-19) which is singled out from the seasonal coronaviruses that regularly circulate throughout the year
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 12
Weekly US Influenza Surveillance Report
Week 41 ending Oct 16 2021Seasonal influenza activity in the United States remains lowbull An annual flu vaccine is the best way to protect against flu and its potentially serious complicationsbull CDC recommends everyone 6 months or older get a flu vaccine by the end of Octoberbull There also are flu antiviral drugs that can be used to treat flu illness
Outpatient Illness ILINet Activity Map
This week 2 jurisdictions experienced moderate activity and no jurisdictions experienced high or very high activity
CDC National Influenza Surveillance (httpwwwcdcgovfluweekly)
- Hospitalized Influenza Surveillance
- Influenza-Associated Death Surveillance
- Respiratory Disease Outbreak Surveillance School Outbreaks
- Respiratory Disease Outbreak Surveillance LTC Outbreaks
- Sentinel Provider Surveillance (Outpatients)
- Laboratory Surveillance
- Minnesota Influenza Incidence Surveillance Project (MIISP)
- Weekly US Influenza Surveillance Report
-
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 11
Minnesota Influenza Incidence Surveillance Project (continued)
Pathogen Group Pathogen Frequency Percent of detections
All Negative None 58
Adenovirus Adenovirus 1 5
Bocavirus Bocavirus - -
Influenza Flu AH12009 - -
Flu AH1seasonal - -
Flu AH3 - -
Flu AUnknown - -
Flu AUnsubtypeable - -
Flu B - -
Parainfluenza Parainfluenza-1 - -
Parainfluenza-2 - -
Parainfluenza-3 - -
Parainfluenza-4 - -
RSVMetapneumovirus Metapneumovirus - -
RSV 5 24
Seasonal Coronavirus Coronavirus-229E - -
Coronavirus-HKU1 - -
Coronavirus-NL63 - -
Coronavirus-OC43 - -
RhinovirusEnterovirus Enterovirus - -
Rhinovirus - -
RhinovirusEnterovirus (non-differentiated) 8 38
SARS-CoV-2 (COVID-19) SARS-CoV-2 7 33
This table details the specific viruses detected during the 2020-21 Influenza season Viruses are grouped by the virus family they belong to with the exception of SARS-CoV-2 (the virus that causes COVID-19) which is singled out from the seasonal coronaviruses that regularly circulate throughout the year
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 12
Weekly US Influenza Surveillance Report
Week 41 ending Oct 16 2021Seasonal influenza activity in the United States remains lowbull An annual flu vaccine is the best way to protect against flu and its potentially serious complicationsbull CDC recommends everyone 6 months or older get a flu vaccine by the end of Octoberbull There also are flu antiviral drugs that can be used to treat flu illness
Outpatient Illness ILINet Activity Map
This week 2 jurisdictions experienced moderate activity and no jurisdictions experienced high or very high activity
CDC National Influenza Surveillance (httpwwwcdcgovfluweekly)
- Hospitalized Influenza Surveillance
- Influenza-Associated Death Surveillance
- Respiratory Disease Outbreak Surveillance School Outbreaks
- Respiratory Disease Outbreak Surveillance LTC Outbreaks
- Sentinel Provider Surveillance (Outpatients)
- Laboratory Surveillance
- Minnesota Influenza Incidence Surveillance Project (MIISP)
- Weekly US Influenza Surveillance Report
-
Minnesota Department of Health Weekly Influenza amp Respiratory Activity Report for Week Ending Oct 23 2021 | WEEK 42 Page 12
Weekly US Influenza Surveillance Report
Week 41 ending Oct 16 2021Seasonal influenza activity in the United States remains lowbull An annual flu vaccine is the best way to protect against flu and its potentially serious complicationsbull CDC recommends everyone 6 months or older get a flu vaccine by the end of Octoberbull There also are flu antiviral drugs that can be used to treat flu illness
Outpatient Illness ILINet Activity Map
This week 2 jurisdictions experienced moderate activity and no jurisdictions experienced high or very high activity
CDC National Influenza Surveillance (httpwwwcdcgovfluweekly)
- Hospitalized Influenza Surveillance
- Influenza-Associated Death Surveillance
- Respiratory Disease Outbreak Surveillance School Outbreaks
- Respiratory Disease Outbreak Surveillance LTC Outbreaks
- Sentinel Provider Surveillance (Outpatients)
- Laboratory Surveillance
- Minnesota Influenza Incidence Surveillance Project (MIISP)
- Weekly US Influenza Surveillance Report
-