Published on in Vol 7, No 2 (2021): February
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/24341, first published
.
![Influenza and Respiratory Virus Surveillance, Vaccine Uptake, and Effectiveness at a Time of Cocirculating COVID-19: Protocol for the English Primary Care Sentinel System for 2020-2021 Influenza and Respiratory Virus Surveillance, Vaccine Uptake, and Effectiveness at a Time of Cocirculating COVID-19: Protocol for the English Primary Care Sentinel System for 2020-2021](https://asset.jmir.pub/assets/146d5de294d60131c15e1b4f7fc3255b.png 480w,https://asset.jmir.pub/assets/146d5de294d60131c15e1b4f7fc3255b.png 960w,https://asset.jmir.pub/assets/146d5de294d60131c15e1b4f7fc3255b.png 1920w,https://asset.jmir.pub/assets/146d5de294d60131c15e1b4f7fc3255b.png 2500w)
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