Weekly influenza reports

FluWatch Summary

March 10, 2019 to March 16, 2019 (week 11)

  • Influenza activity continues to be reported in almost all regions in Canada but is circulating at higher levels in eastern regions.
  • Detections of influenza A(H3N2) have been steadily increasing since mid-January and accounted for 64% of subtyped influenza A detections this week; however, influenza A(H1N1)pdm09 remains the predominant subtype to date this season.
  • There is currently very little influenza B circulation compared to previous seasons.
  • The World Health Organization (WHO) has released the recommended composition of the influenza vaccine for use in the 2019-2020 northern hemisphere influenza season. The recommended strain was changed for each of the A(H1N1)pdm09 and A(H3N2) components compared to this year's vaccine.
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