Weekly influenza reports

Fluwatch Summary

January 7, 2018 to January 13, 2018 (week 2)

  • Overall, influenza activity in Canada remains high.
  • Most indicators have slowed their increase, remained similar, or declined compared to the previous week, suggesting that we may be nearing the peak of the season at the national level.
  • Most indicators remain in the higher range of expected levels for this time of year.
  • The majority of influenza detections continue to be A(H3N2), although 37% of detections were influenza B in week 02.
  • Influenza B began circulating much earlier than usual this season. The number of influenza B detections remains substantially greater this season compared to previous years.
  • To date this season, the majority of lab confirmations, hospitalizations and deaths have been among adults 65 years of age and older.
  • For more information on the flu, see our Flu(influenza) web page.

The FluWatch interactive maps are not yet available for the 2017-18 season. We apologize for any inconvenience.

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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