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. 2022 Nov 11;8(11):e36712. doi: 10.2196/36712

Table 2.

Taking influenza vaccines before having COVID-19.


Vaccinated before having COVID-19 (n=114,181)
Campaign of 2019-2020 (recent immunization), n (%) 66,611 (58.3)

Days from vaccination to infection, median (IQR) 146.0 (127.0-169.0)
Campaign of 2018-2019, n (%)  60,161 (52.7)

Days from vaccination to infection, median (IQR) 515.0 (495.0-539.0)
Campaign of 2017-2018 or before, n (%) 102,235 (89.5)

Days from vaccination to infection, median (IQR) 931.0 (875.0-2018.0)
Campaigns during which participants were vaccinated before having COVID-19, n (%)

1 26,786 (23.5)

2 12,084 (10.6)

≥3 (recurrent immunization) 75,311 (66.0)

3 7931 (6.9)

4-5 11,146 (9.8)

6-10 18,945 (16.6)

>10 37,289 (32.7)