Ahead of an FDA meeting on COVID vaccine boosters, Pfizer submitted a study suggesting vaccine efficacy fades over time naturally, irrespective of variant
Pfizer and Moderna say COVID-19 vaccine protection wanes after six to eight months ottawacitizen.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from ottawacitizen.com Daily Mail and Mail on Sunday newspapers.