Canadian respiratory virus surveillance report: Summary

Update schedule: Data in this report are updated every Friday. This page was last updated on September 27th, 2024, 10am ET, with data up to and including ... (surveillance week ...).

This overview tab provides a high level summary of trends for COVID-19, influenza and RSV. For more detailed trends on each virus, refer to the individual virus tabs at the top of the page. Data from the Respiratory Virus Detection Surveillance System (RVDSS) are now found in the laboratory data tab.

On this page

• Highlights
• About the Canadian respiratory virus surveillance report
• Provincial, territorial, and international reports

Highlights  for the week ending (week )

About the Canadian respiratory virus surveillance report

The Canadian respiratory virus surveillance report, produced by the FluWatch+ surveillance program offers a weekly epidemiological summary of COVID-19, influenza, RSV, and other respiratory viruses (where data is available) in Canada.

We would like to thank all the FluWatch+ surveillance partners participating in this year's influenza surveillance program.

The FluWatch+ surveillance program has expanded to provide a more comprehensive picture of respiratory virus activity and burden. For more information about this approach, including links to additional surveillance resources which are not included in this dashboard, please visit PHAC's Integrated Approach for National Surveillance of Respiratory Viruses page.

Interpretation notes

• Surveillance data reported in the Canadian Respiratory Virus Surveillance Report is used to monitor trends in respiratory virus activity throughout the surveillance season namely where, when, and what viruses are circulating as well as whether activity is increasing or decreasing. These data are an underestimate and are not intended to reflect the true number of cases in Canada.
• Due to variations in how data are reported, indicators for COVID-19, influenza and RSV may not be directly comparable. Where data for each virus are presented separately, comparisons between should be avoided.
• The data in the Canadian Respiratory Virus Surveillance Report represent surveillance data that are available at the time of writing. Surveillance partners are encouraged to update previously submitted data throughout the surveillance season. All data are preliminary and may change as more reports are received throughout the surveillance season.
• The FluWatch+ program refers to time in surveillance weeks. This allows for the comparison of historical data (e.g. comparing data from week 45 in the 2021-22 season to week 45 of the 2019-2020 season). Data are aggregated by surveillance weeks that run from Sunday through Saturday.
• The surveillance period for each influenza season begins in week 35 of a calendar year (end of August) and ends in week 34 of the following calendar year (end of August). A calendar of surveillance weeks for the current season is available online for reference.
• To learn more about the FluWatch+ program, see the Overview of influenza monitoring in Canada page.

Provincial, territorial, and international reports