Influenza surveillance in Alberta

Evidence of influenza in Alberta 2015–2016

Summary: Week 16, April 17–23, 2016

Influenza activity continues to decline in Alberta. The epidemic curve continues to be a broad, sustained peak with a large area under the curve in contrast to previous H1N1-predominant seasons. The number of lab-confirmed cases has passed the alert threshold, indicating that the number of lab-confirmed cases reported this year is higher than usual.

Three influenza B outbreaks were reported in week 16: all 3 in long term care facilities. There have been 56 outbreaks to date.

North
  • Sporadic activity
  • Edmonton
  • Localized activity
  • Central
  • Sporadic activity
  • Calgary
  • Localized activity
  • South
  • Sporadic activity
  • Activity level definitions

    • No activity – No laboratory-confirmed influenza detections in the reporting week. However, sporadically occurring influenza-like illness (ILI) may be reported.
    • Sporadic – Sporadically occuring ILI and lab confirmed influenza detection(s) with no ILI/influenza outbreaks detected within the health zone.
    • Localized – Evidence of increased ILI and lab confirmed influenza detection(s) together with outbreaks in schools, hospitals, residential institutions and/or other types of facilities occurring in less than 50% of the health zone.
    • Widespread – Evidence of increased ILI and lab confirmed influenza detection(s) together with outbreaks in schools, hospitals, residential institutions and/or other types of facilities occurring in greater than or equal to 50% of the health zone.

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    2015–2016 reports

    2014–2015 reports

    Summary reports