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IMAC WCTO Symposium
1
A/Professor Tony WallsPaediatric Infectious Diseases Specialist
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CoVID -19 in children
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• This is not influenza or SARS
• The severity of disease and the transmission dynamics are very different in children
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CoVID-19 in children
• NZ and global epidemiology
• Is it safe for children to be in schools?– Transmission dynamics
• What do parents think?
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CoVID-19 in NZ children
• No hospital admissions
• Age 0-10yrs – 10 confirmed, 27 probable
• Age 10-14yrs– 29 confirmed, 18 probable
Medical students visited Te Pa o Rakaihautu
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MMRW March 18 2020
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Otto et al JPIDS June 2020
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NZ school clusters
• No clusters in pre-schools or primary schools
• Logan Park High School– No transmission in school
• Marist cluster– Mostly adult cases– Index cases teachers– Only 1 case of child-child
transmission
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• 18 individuals with CoVID-19 from 15 schools• 735 students and 128 staff close contacts• No adult contacted disease from a child
COVID-19 in schools – the experience in NSW | April 2020 Report
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Cases and contacts among teachers and students in 5 NSW primary schools
COVID-19 in schools – the experience in NSW | April 2020 Report
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79% thought it likely/very likely that their child would catch CoVID-19 at school if widespread community transmission
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14.5% extremely/very worried about their children catching CoVID-19 just prior to schools opening
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NZ Herald Oct 2017
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Latin miser – unhappy, pitiable, wretched, in distress
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National coverage 2007 - 2011
50
55
60
65
70
75
80
85
90
95
100
July 2007 July 2008 July 2009 July 2010 July 2011 July 2012
Year
Cove
rage
Annual targets
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Immunisation coverage Canterbury
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Number of measles notifications by month reported,January 2009 to June 2019
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Who gets measles?
NZ cases January – April 2019
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Pertussis in infants
Most severe disease in the youngest infants27
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This is your baby’s first vaccine
?
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Pertussis vaccine in pregnancy
• Passive immunity for babies at birth
• Most protection early in life
• 93% effective in preventing hospital admissions first 3 months
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