Table 1.
Influenza virus laboratory surveillance data
| Seasona | Total specimens | Number of detected specimen (positivity rate %) | IFV total | ||
|---|---|---|---|---|---|
| IFV A H1N1(pdm09) |
IFV A H3N2 |
IFV B | |||
| 2011–2012 | 14,628 | 1 (0.00%) | 1950 (51.5%) | 1834 (48.5%) | 3785 (25.88%) |
| 2012–2013 | 13,951 | 332 (19.48%) | 1276 (74.88%) | 96 (5.63%) | 1704 (12.21%) |
| 2013–2014 | 12,343 | 346 (16.52%) | 640 (30.56%) | 1108 (52.91%) | 2094 (16.97%) |
| 2014–2015 | 11,065 | 176 (10.94%) | 836 (51.96) | 597 (37.10%) | 1609 (14.54%) |
| 2015–2016 | 10,933 | 582 (44.09%) | 62 (4.70%) | 675 (51.14%) | 1320 (12.07) |
| 2016–2017 | 11,526 | 6 (0.50%) | 882 (72.89%) | 322 (26.61%) | 1210 (10.50%) |
| 2017–2018 | 11,989 | 141 (7.00%) | 771 (38.30%) | 1101 (54.69%) | 2013 (16.79%) |
| 2018–2019 | 11,862 | 760 (41.90%) | 379 (20.89%) | 675 (37.21%) | 1814 (15.29%) |
| 2019–2020 | 8640 | 825 (70.45%) | 297 (25.36%) | 49 (4.18%) | 1171 (13.55%) |
| 2020–2021 | 4334 | 0 (0.00%) | 0 (0.00%) | 0 (0.00%) | 0 (0.00%) |
| 2021–2022 | 5959 | 0 (0.00%) | 38 (100.00%) | 0 (0.00%) | 38 (0.64%) |
aInfluenza season defined as week 36 to week 35 of the following year