E P I D E M I C A L E R T A N D R E S P O N S E SEARO –CSR Early Warning and Surveillance System Module

Event-based Surveillance

E P I D E M I C A L E R T A N D R E S P O N S E SEARO –CSR Early Warning and Surveillance System Module

Surveillance system

EWAR

Event based Case based

Report

signal

Report

signal

Outbreak investigationEvaluation

Introduction to surveillance

Role of IHR

EWAR •Structure,•Prioritization of diseases,•Case definitions

Signal generation

and verification

GIS

System evaluation

Outbreak investigation

Alert

Routineweekly, monthly and quarterly reporting

E P I D E M I C A L E R T A N D R E S P O N S E SEARO –CSR Early Warning and Surveillance System Module

Objectives of this lecture

• To provide an overview of event based surveillance and of the event management

system

E P I D E M I C A L E R T A N D R E S P O N S E SEARO –CSR Early Warning and Surveillance System Module

Introduction

Case vs Event

Event Management• Identify• Assess• Inform• Assist

- Event based surveillance is

the organized and rapid ca

pture of information about

events that are a potential

risk to public health.

E P I D E M I C A L E R T A N D R E S P O N S E SEARO –CSR Early Warning and Surveillance System Module

Introduction

Case vs Event

Event Management• Identify• Assess• Inform• Assist

•Events related to the

occurrence of disease in

humans,

•Events related to

potential exposure for

humans.

Events

E P I D E M I C A L E R T A N D R E S P O N S E SEARO –CSR Early Warning and Surveillance System Module

Introduction

Case vs Event

Event Management• Identify• Assess• Inform• Assist

Case based vs Event Based EWAR

Event Based Surveillance

AIM: Rapid detection, reporting, confirmation,assessment of public health events.

OUTPUT: Immediate reporting.

Event Based Surveillance

AIM: Rapid detection, reporting, confirmation,assessment of public health events.

OUTPUT: Immediate reporting.

Case Based Surveillance

AIM: Systematic reporting of cases of disease, commonly Health care facility based.

OUTPUT: Daily, Weekly reporting.

Case Based Surveillance

AIM: Systematic reporting of cases of disease, commonly Health care facility based.

OUTPUT: Daily, Weekly reporting.

Information for

Action

E P I D E M I C A L E R T A N D R E S P O N S E SEARO –CSR Early Warning and Surveillance System Module

Introduction

Case vs Event

Event Management• Identify• Assess• Inform• Assist

Event Management

Standardized process for

managing events that

threaten international

health security

E P I D E M I C A L E R T A N D R E S P O N S E SEARO –CSR Early Warning and Surveillance System Module

Introduction

Case vs Event

Event Management• Identify• Assess• Inform• Assist

Event Management

GOAL PRINCIPLE

•Events are detected early Timeliness

•Reactions are appropriate Proportionality

•The international community is

provided with timely and accurate

information about the event

Information

sharing

•Effective international assistance

is made availableAssistance

E P I D E M I C A L E R T A N D R E S P O N S E SEARO –CSR Early Warning and Surveillance System Module

Introduction

Case vs Event

Event Management• Identify• Assess• Inform• Assist

Step 1Identify

Scan

Screen

Verify

E P I D E M I C A L E R T A N D R E S P O N S E SEARO –CSR Early Warning and Surveillance System Module

Definition

EWARand IHR

Objectives

Framework

Steps1. Data2. Signals3. Verification4. Response5.Communication

M&E

No

Would the event be relevant?

Yes

Immediateverificationrequired?

Status

Decision

Process

Irrelevant event

Submitted Event

No

Verification within 24 hours

Event not verified

Yes

Verification

Signal

Information from selected sources

Information flow in an Event Management System

E P I D E M I C A L E R T A N D R E S P O N S E SEARO –CSR Early Warning and Surveillance System Module

Introduction

Case vs Event

Event Management• Identify• Assess• Inform• Assist

Step 2Assess

• Assist,

• Monitor, or

• Discard.

E P I D E M I C A L E R T A N D R E S P O N S E SEARO –CSR Early Warning and Surveillance System Module

Introduction

Case vs Event

Event Management• Identify• Assess• Inform• Assist

Step 3InformThrough:

•The IHR event information

site,

•The WHO websites,

•GOARN,

•Disease/hazard specific

networks,

•Media talking points.

E P I D E M I C A L E R T A N D R E S P O N S E SEARO –CSR Early Warning and Surveillance System Module

Introduction

Case vs Event

Event Management• Identify• Assess• Inform• Assist

Step 4Assist

Through:

•Technical advice,

•Specialized materials,

•Deploying and

supporting international

teams to affected areas,

and/or

•Coordinating

international support.

E P I D E M I C A L E R T A N D R E S P O N S E SEARO –CSR Early Warning and Surveillance System Module

Question Time

Why would I choose to implement event

based surveillance as a component

of my EWAR system?

What would be the advantages for my

Health System as a whole?

E P I D E M I C A L E R T A N D R E S P O N S E SEARO –CSR Early Warning and Surveillance System Module

IHR - Event notification and determination IHR - Event notification and determination

Community concern

MediaPrivate/public clinicians concern

Public services, agencies

Health care system

Lab

Pharmacies

HOT LINEInformal system

Event-based

Surveillance Health system based

Signal

YesALERT

Public health risk identifiedUnusual disease pattern ?

Event verified ?

Public health Significance?

InternationalConcern?

PHEICInvestigation

& control

Notificationto WHO

Yes

Yes

Early Warning Response

Source

Status

Decision

Action

IHR National Focal Point

IHR WHO Focal Point