Table 1.
Trends in Influenza Virus Testing Across Different Influenza Seasons
| Characteristics | 2017/2018 (n=14,902) | 2018/2019 (n=14,762) | 2019/2020 (n=25,070) | 2020/2021 (n=1107) | P |
|---|---|---|---|---|---|
| Age (years) | 27.1±26.9 | 30.0±25.8 | 22.0±21.3 | 40.0±27.2 | 0.889 |
| ≤16 year | 8038 (53.94%) | 7913 (53.60%) | 15,569 (62.10%) | 325 (29.36%) | <0.01 |
| >16 year | 6864 (46.06%) | 6849 (46.40%) | 9501 (37.90%) | 782 (70.64%) | |
| Sex | 0.991 | ||||
| Male | 7087 (47.56%) | 6942 (47.03%) | 12,312 (49.11%) | 549 (49.59%) | |
| Female | 7815 (52.44%) | 7820 (52.97%) | 12,758 (50.89%) | 558 (50.41%) | |
| Total positive rate | <0.01 | ||||
| Positive | 4836 (32.45%) | 5290 (35.84%) | 7515 (29.98%) | 6 (0.54%) | |
| Negative | 10,066 (67.55%) | 9472 (64.16%) | 17,555 (70.02%) | 1101 (99.46%) | |
| Type of influenza virus | <0.01 | ||||
| A | 7484 | 9977 | 12,729 | 650 | |
| Positive rate | 2630 (35.14%) | 5006 (50.18%) | 4159 (32.67%) | 3 (0.46%) | |
| B | 7418 | 4785 | 12,341 | 457 | |
| Positive rate | 2206 (29.74%) | 274 (5.73%) | 3212 (26.03%) | 3 (0.66%) |