Department of Defense Study – Flu Shot Increased Risk of Coronavirus Infection 36%

“Receipt of influenza vaccination was not associated with virus interference among our population. Examining virus interference by specific respiratory viruses showed mixed results. Vaccine derived virus interference was significantly associated with coronavirus and human metapneumovirus; however, significant protection with vaccination was associated not only with most influenza viruses, but also parainfluenza, RSV, and non-influenza virus coinfections.”

Influenza vaccination and respiratory virus interference among Department of Defense personnel during the 2017–2018 influenza season

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