Table 3. Number of laboratory tests, detections, and percentage positivity by province/territory for the 2021–2022 Canadian influenza season.
| Province/territory | Influenza tests | Influenza detections | Peak weekly influenza percent positivity | Cumulative influenza percent positivity | ||||
|---|---|---|---|---|---|---|---|---|
| All influenza | Influenza A | Influenza B | ||||||
| % | 95% CIa | % | 95% CIa | |||||
| Newfoundland and Labrador | 15,930 | 327 | 327 | 0 | 7.9 | 6.0–9.8 | 2.1 | 1.8–2.3 |
| Prince Edward Island | 2,807 | 65 | 65 | 0 | 25.5 | 13.1–38.0 | 2.3 | 1.8–2.9 |
| Nova Scotia | 27,351 | 431 | 422 | 9 | 8.3 | 6.1–10.4 | 1.6 | 1.4–1.7 |
| New Brunswick | 21,601 | 495 | 495 | 0 | 25.9 | 21.6–30.3 | 2.3 | 2.1–2.5 |
| Québec | 131,566 | 7,634 | 7,524 | 110 | 26.6 | 25.3–27.9 | 5.8 | 5.7–5.9 |
| Ontario | 105,633 | 904 | 897 | 7 | 6.4 | 5.4–7.5 | 0.9 | 0.8–0.9 |
| Manitoba | 60,920 | 577 | 577 | 0 | 9.4 | 7.4–11.3 | 0.9 | 0.9–1.0 |
| Saskatchewan | 32,914 | 781 | 781 | 0 | 13.5 | 10.8–16.2 | 2.4 | 2.2–2.5 |
| Alberta | 102,875 | 2,716 | 2,713 | 3 | 11.9 | 10.6–13.1 | 2.6 | 2.5–2.7 |
| British Columbia | 225,352 | 1,558 | 1,462 | 96 | 3.9 | 3.2–4.5 | 0.7 | 0.7–0.7 |
| Yukon Territory | 5,511 | 21 | 14 | 7 | 33.3 | 0.0–71.1 | 0.4 | 0.2–0.5 |
| Northwest Territories | 2,263 | 207 | 207 | 0 | 31.5 | 23.4–39.6 | 9.1 | 8.0–10.3 |
| Nunavut | 17,177 | 410 | 410 | 0 | 53.8 | 44.8–62.9 | 2.4 | 2.2–2.6 |
| Canada | 751,900 | 16,126 | 15,894 | 232 | 12.6 | 12.1–13.1 | 2.1 | 2.1–2.2 |
Abbreviation: CI, confidence interval
a Binomial proportion Wald confidence interval