Pfizer vaccine dramatically reduces Covid transmission risk after one dose, study shows msn.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from msn.com Daily Mail and Mail on Sunday newspapers.
Researchers analysed results from thousands of Covid-19 tests carried out each week as part of hospital screenings of healthcare staff in Cambridge, eas.
Pfizer Covid Vaccine Reduces Transmission After One Dose, Study Finds huffingtonpost.co.uk - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from huffingtonpost.co.uk Daily Mail and Mail on Sunday newspapers.