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Overall Summary

  • Influenza B continued to be the most common influenza virus circulating in Canada. More influenza B detections have been observed to date this season, compared to the same time last season.
  • The number of influenza A and B detections remained similar to the previous week. Other circulating respiratory viruses continue to decrease with the end of the 2014-15 influenza season approaching.
  • Elevated influenza activity was mostly reported in the Central and Atlantic provinces. Widespread activity was reported in two regions in Quebec.
  • Influenza B is having a greater impact on adults less than 65 years of age, compared to influenza A(H3N2), which circulated earlier in the season.

Are you a primary health care practitioner (General Practitioner, Nurse Practitioner or Registered Nurse) interested in becoming a FluWatch sentinel for the 2014-15 influenza season? Contact us at

About FluWatch

FluWatch is Canada's national surveillance system that monitors the spread of flu and flu-like illnesses on an on-going basis. FluWatch reports, posted every Friday, contain specific information for health professionals on flu viruses circulating in Canada.

The FluWatch program consists of a network of labs, hospitals, doctor's offices and provincial and territorial ministries of health. Program objectives include to:

  • Detect flu outbreaks across the country as early as possible
  • Provide timely up-to-date information on flu activity in Canada and abroad to health professionals [and interested Canadians]
  • Monitor circulating strains of the flu virus (like H1N1) and assess their sensitivity to antiviral medications, [such as Tamiflu and Relenza]. Antivirals, when used by doctors to treat flu, can help reduce the severity of the illness and the recovery time for a patient
  • Provide information that the World Health Organization can use to make its recommendations on the best vaccine to use for seasonal flu shots.

The Summary Box above covers the main findings from the current week's FluWatch report.