Weekly influenza reports

FluWatch Summary

May 19 to June 22, 2019 (Weeks 21 to 25)

  • Influenza activity in Canada continues to decline. All indicators of influenza activity are decreasing and within the expected interseasonal range for this time of year.
  • Influenza A(H3N2) and influenza B continue to co-circulate. Influenza detections are low, although influenza A levels are higher than average for this time of year.
  • Over this five-week period, 61% of detections were influenza A, and 86% of subtyped influenza A detections were A(H3N2).
  • Influenza A(H1N1)pdm09 remains the predominant subtype overall for the 2018-19 season (69% of subtyped influenza A detections).
  • The next FluWatch report will be published on July 26, 2019. Weekly reporting of laboratory detections of respiratory viruses continues via our Respiratory Virus Detections Surveillance System.
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