The Elm | UMSOM COVID-19 Expert: Booster Vaccine Best Way to Protect Against Variants umaryland.edu - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from umaryland.edu Daily Mail and Mail on Sunday newspapers.
The highly mutated strain raises new questions about how well existing COVID-19 vaccines will hold up, although it's not yet known whether revamped shots will be needed.