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, 2025-2026, starts on August 24, 2025 and ends on August 29, 2026. 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 November 29, 2025. Among its new features, the dashboard now includes RSV Severe Outcomes data.
Summary of laboratory-confirmed respiratory viruses, 2025-2026
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
1,588
20,362
0.7
0.4
SARS-CoV-2
4,230
45,404
6.1
5.6
Coronavirus
1,587
20,356
0.6
0.8
Human Metapneumovirus (hMPV)
1,587
20,356
0.3
0.3
Influenza (All)
3,911
34,774
17.8
14.7
Influenza A
3,910
34,772
17.5
14.5
Influenza B
3,909
34,764
0.3
0.2
Parainfluenza
1,587
20,357
2.5
2.3
Respiratory Syncytial Virus
3,665
33,208
2.3
1.7
Rhinovirus/Enterovirus
1,587
20,349
10.8
11.2
Respiratory virus test positivity by week, 2025-2026
Respiratory virus test positivity by week and zone, 2025-2026
Zone
SARS-CoV-2
Influenza (All)
Influenza A
Influenza B
Respiratory Syncytial Virus
Alberta
Calgary Zone
Central Zone
Edmonton Zone
North Zone
South Zone
Unknown
Zone
Rhinovirus/Enterovirus
Adenovirus
Coronavirus
Parainfluenza
Human Metapneumovirus (hMPV)
Alberta
Calgary Zone
Central Zone
Edmonton Zone
North Zone
South Zone
Unknown
Respiratory virus test positivity by week for the 2025-2026 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, 2021-2022 to 2025-2026
Influenza testing and positivity by week, 2021-2022 to 2025-2026
Respiratory syncytial virus testing and positivity by week, 2021-2022 to 2025-2026
Adenovirus testing and positivity by week, 2021-2022 to 2025-2026
Coronavirus testing and positivity by week, 2021-2022 to 2025-2026
Rhinovirus/enterovirus testing and positivity by week, 2021-2022 to 2025-2026
Human metapneumovirus (hMPV) testing and positivity by week, 2021-2022 to 2025-2026
Parainfluenza testing and positivity by week, 2021-2022 to 2025-2026