Circulation of respiratory viruses is normally highest in the fall and winter. For the purposes of reporting and comparisons over time and between viruses, the respiratory season typically runs from late August of the current year to late August of the following year. The current season, 2023-2024, starts on August 27, 2023 and ends on August 24, 2024. Additional information on respiratory season, and a full calendar for the current season, can be found on the Data Notes page.
Respiratory virus data included in the interactive data application is up-to-date as November 25, 2023. Among its new features, the dashboard now includes RSV cases and positivity, with plans to collect Severe Outcomes data in the near future.
Wastewater surveillance is conducted by Alberta Precision Laboratories’ Provincial Laboratory for Public Health (ProvLab). Prior to July 2023, this program was conducted in partnership with the University of Calgary and the University of Alberta. Historical data from prior to July 2023 should not be compared to current values reported because historical data was not normalized to the approximate population of the catchment area, and due to a change in laboratory methodology.
The updated method enables comparisons in the quantity of virus between municipalities, which was not possible prior to July 2023. Thanks to aggregate visitor numbers provided by Parks Canada, we have refined the population normalization at these unique sites to more directly compare between these and other municipalities; however, we still urge caution when interpreting data between tourist sites and municipalities.
Population normalized quantity of SARS CoV-2 virus over time
Note: Dates are when wastewater collection took place.