Because vaccine is such a loaded word.
Influenza vaccination and respiratory virus interference among Department of Defense personnel during the 2017-2018 influenza season
https://www.sciencedirect.com/science/article/pii/S0264410X19313647
“Receiving influenza vaccination may increase the risk of other respiratory viruses, a phenomenon known as virus interference…
It was planned.
Examining virus interference by specific respiratory viruses showed mixed results. Vaccine derived virus interference was significantly associated with coronavirus and human metapneumovirus.”
Sue the doctors who pushed the “jab”, they get paid per person.
Best not to participate in any monkey’s business at all, if you can help it.