Weekly influenza reports

Fluwatch Summary

May 21 – June 17, 2017 (weeks 21-24)

  • Influenza activity has crossed the seasonal threshold indicating the end of the 2016-17 influenza season, although regions across the country continue to report low-level circulation of influenza.
  • In weeks 21-24, influenza B continued to be the predominant circulating influenza virus in Canada. The majority of influenza B viruses characterized this season are similar to the strain included only in the quadrivalent influenza vaccine for 2016-17. 
  • FluWatch will publish monthly reports over the summer. The next report will be published on July 28, 2017. We continue to monitor influenza and other respiratory infections  via the RVDSS report, published every Thursday.
  • For more information on the flu, see our Flu(influenza) web page.

Are you a primary healthcare practitioner (General Practitioner, Nurse Practitioner or Registered Nurse) interested in becoming a FluWatch sentinel? Please visit our Influenza Sentinel page for more details or contact us at

Subscribe to FluWatch reports - fluwatch@phac-aspc.gc.ca

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