Feds probe possible stroke link to new Pfizer COVID booster By iopac on January 18, 2023 Follow-up investigations in the US and other nations and by the company have not found the same increase. Published in COVID-19 iopac More from COVID-19More posts in COVID-19 »Peer support valuable intervention for health worker stress during COVID-19, study showsGlobal survey shows COVID booster uptake in questionStudy: COVID vaccines not linked to seizuresCOVID booster linked to 25% lower odds of long COVID