Weekly influenza reports

FluWatch Summary

April 7 to April 13, 2019 (Week 15)

  • Due to the shortened reporting week, not all data providers were able to report their data.
  • A second smaller wave of sustained influenza activity, dominated by A(H3N2), continues to be observed in Canada.
  • Detections of influenza A(H3N2) have been steadily increasing since mid-January and accounted for 83% of subtyped influenza A detections this week; however, influenza A(H1N1)pdm09 remains the predominant subtype to date this season.
  • Detections of influenza A continue to be greater than those of influenza B. There is currently very little influenza B circulation compared to previous seasons.
  • For more information on Canadian estimates of vaccine coverage and effectiveness, please see the new vaccine monitoring section in the FluWatch report.
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