FluWatch reports:
2006-2007 Season
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FluWatch reports include data and information from four main sources: laboratory reports of positive influenza tests in Canada; sentinel physician reporting of influenza-like illness (ILI); provincial/territorial assessment of influenza activity based on various indicators, including laboratory surveillance, ILI reporting, school and work site absenteeism, and outbreaks; influenza-associated pediatric hospitalizations; WHO and other international reports of influenza activity.
The map shows influenza activity in the “influenza surveillance regions” † within each jurisdiction, as determined by the provincial/territorial epidemiologists.
ILI definitions for the 2006-2007 season
ILI in the general population: Acute onset of respiratory illness with fever and cough and with one or more of the following - sore throat, arthralgia, myalgia, or prostration which could be due to influenza virus. In children under 5, gastrointestinal symptoms may also be present. In patients under 5 or 65 and older, fever may not be prominent.
Definitions of ILI/Influenza outbreaks for the 2006-2007 season
Schools and work sites: greater than 10% absenteeism on any day most likely due to ILI
Residential institutions: two or more cases of ILI within a seven-day period, including at least one laboratory confirmed case. Institutional outbreaks should be reported within 24 hours of identification.
Influenza activity levels are defined as: |
1 = |
No activity |
i.e. no laboratory-confirmed influenza detections during the past four weeks, however, sporadically occurring ILI may be reported |
2 = |
Sporadic: |
sporadically occurring ILI and lab confirmed influenza* with NO outbreaks detected within the influenza surveillance region† |
3 = |
Localized: |
sporadically occurring ILI and lab confirmed influenza* together with outbreaks of ILI in schools and worksites or laboratory confirmed influenza in residential institutions occurring in less than 50% of the influenza surveillance region(s)† |
4 = |
Widespread: |
sporadically occurring ILI and lab confirmed influenza* together with outbreaks of ILI in schools and worksites or laboratory confirmed influenza in residential institutions occurring in greater than or equal to 50% of the influenza surveillance region(s)† |
* confirmation of influenza within the surveillance region at any time within the prior four weeks
sub-regions within the province or territory as defined by the provincial/territorial epidemiologist
We would like to thank all the Fluwatch surveillance partners who are participating in this year’s influenza surveillance program. |
[FluWatch]
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