Interactive aggregate data on respiratory related cases in Alberta
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, 2024-2025, starts on August 25, 2024 and ends on August 23, 2025. 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 of March 22, 2025. Among its new features, the dashboard now includes RSV Severe Outcomes data.
Summary of laboratory-confirmed respiratory viruses, 2024-2025
Respiratory virus
Number of tests in the current week (n)
Cumulative number of tests in the season (n)
Percent positivity in the current week (%)
Rolling percent positivity (%; previous 3 weeks)
Adenovirus
1,658
41,041
0.8
1.1
SARS-CoV-2
6,354
174,693
0.9
1.2
Coronavirus
1,657
41,016
5.5
6.2
Human Metapneumovirus (hMPV)
1,655
40,997
7.6
6.4
Influenza (All)
6,052
127,823
22.2
23.2
Influenza A
6,047
127,632
20.7
21.9
Influenza B
5,653
122,268
1.7
1.5
Parainfluenza
1,657
41,148
2.5
2.1
Respiratory Syncytial Virus
5,329
115,284
2.3
2.6
Rhinovirus/Enterovirus
1,657
40,942
6.9
6.3
Respiratory virus test positivity by week, 2024-2025
Respiratory virus test positivity by week and zone, 2024-2025
Zone
SARS-CoV-2
Influenza (All)
Influenza A
Influenza B
Respiratory Syncytial Virus
Alberta
Calgary Zone
Central Zone
Edmonton Zone
North Zone
South Zone
Zone
Rhinovirus/Enterovirus
Adenovirus
Coronavirus
Parainfluenza
Human Metapneumovirus (hMPV)
Alberta
Calgary Zone
Central Zone
Edmonton Zone
North Zone
South Zone
Respiratory virus test positivity by week for the 2024-2025 season compared to historical trends
Grey shaded area represents historical minimum and maximums for percent positivity. The dotted grey line represents the historical average positivity during that respiratory week. Historical calculations are based on the previous five seasons. For COVID-19, everything prior to the 2019-2020 season is excluded. For influenza, everything prior to the 2019-2020 season is excluded.
SARS-CoV-2 testing and positivity by week, 2020-2021 to 2024-2025
Influenza testing and positivity by week, 2020-2021 to 2024-2025
Respiratory syncytial virus testing and positivity by week, 2020-2021 to 2024-2025
Adenovirus testing and positivity by week, 2020-2021 to 2024-2025
Coronavirus testing and positivity by week, 2020-2021 to 2024-2025
Rhinovirus/enterovirus testing and positivity by week, 2020-2021 to 2024-2025
Human metapneumovirus (hMPV) testing and positivity by week, 2020-2021 to 2024-2025
Parainfluenza testing and positivity by week, 2020-2021 to 2024-2025