Postponing the second dose of Covid-19 vaccines is "very risky" because the efficacy data was based on a specific dosage schedule, a former FDA director told
Valneva Appoints Dr. Thomas Decker and Dr. Michael Pfleiderer to its Scientific Advisory Board – Valneva valneva.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from valneva.com Daily Mail and Mail on Sunday newspapers.