COVID-19 Updates: State of public health emergency declared.
Seasonal Influenza in Alberta
Influenza data included in the interactive data application are aggregated by week and up-to-date as of end of week 46 (November 20, 2021), unless stated otherwise.
influenza A 📈
influenza B 📈
Table 1: Summary of laboratory-confirmed seasonal influenza in Alberta, 2021-2022
There have been no severe outcomes reported this season.
Laboratory TestingTable 3: Summary of influenza viruses, 2021-2022
There have been no influenza outbreaks reported this season.
Communicable Disease Reporting System (CDRS), Alberta Health Provincial Surveillance Information (PSI), Alberta Health Alberta Health Care Insurance Plan (AHCIP) Quarterly Population Registry, Alberta Health Immunization/Adverse Reactions to Immunization (Imm/ARI), Alberta Health
Influenza outbreaks that occur in group settings such as hospitals, residential institutions, schools, and child care facilities are reported to Alberta Health. Outbreaks are defined as the occurrence of a communicable disease in a community, region, or setting where the number of cases is more than would be expected for a defined period of time. Influenza outbreaks in hospitals, residential institutions, and other closed communities are defined as two or more cases of influenza-like illness, with at least one laboratory-confirmed case. School influenza outbreaks require greater than 10 per cent absenteeism or absenteeism that is 10 per cent higher than baseline levels. Please see the and for more information.
Influenza percent positivity in Alberta is calculated using the Test Over Test method, which is the same method employed by the US Centers for Disease Control and Prevention. The calculation is as follows:
Daily Number of Positive Tests / (Daily Number of Positive Tests + Daily Number of Negative Tests) Q/RT-PCR tests are the only COVID-19 tests included in this calculation.
Individuals who received one dose was calculated as (# of individuals who received at least one dose) / (population estimate).
*‘Other Providers’ include Alberta Health Services (AHS) non-Public Health, non-AHS (including Long-term care (LTC) sites) and Physicians from AHS, IDSM, AHS Workplace Health and Safety (WHS) and Covenant Health Occupational Health and Safety (OHS) and First Nations and Inuit Health Branch (FNIHB). Includes influenza immunization doses administration data from AHS (AHS non-Public Health, non-AHS (including LTC sites) and Physicians), AH (IDSM, WHS and Covenant OHS) and FNIHB for the month of Oct, Nov, Dec, Jan, Feb, Mar 2021/22.
The content and format of this report are subject to change. Cases are under investigation and numbers may fluctuate as cases are resolved.
Doses Administered 💉
Influenza Weekly Immunization Report to 20 November, 2021 (Fluwatch week 46)
922,971 doses of influenza vaccine have been administered in Alberta
112,443 doses of influenza vaccine have been administered by AHS
740,865 doses of influenza vaccine have been administered by pharmacies
69,663 doses of influenza vaccine have been administered by other providers*
20.9% of Albertans have received an influenza vaccine
- This week, in the 2020-2021 season, a total of 1,298,466 doses were administered (Provincial coverage = 29.4%)
Table 1: Influenza vaccine doses administered and coverage by AHS health zone and provider
|Zone||AHS||Pharmacy||Other||Total administered||Population||Coverage (%)|
Table 2: Influenza vaccine doses administered and coverage by age group (5-year groups) and provider
|Age groups||AHS||Pharmacy||Other||Total administered||Population||Coverage (%)|
|under 1 year||6,333||0||375||6,708||51,726||13.0|
Table 3: Influenza vaccine doses administered and coverage by season and provider
|Influenza Season||Public Health||Pharmacy||Other||Total||Coverage (%)|