A Washington DC man was left excessively bleeding due to a rare side effect linked to his Covid vaccine booster.

RNA-1083 vaccine is noninferior and induces higher immune responses than recommended influenza and COVID-19 vaccines.

Data across nine pre-COVID flu seasons in Ontario reveal that flu vaccine effectiveness (VE) wanes 9% every 28 days beginning 41 days post-vaccination in adults but not in children, according to a ...