Pfizer says early evidence suggests its vaccine may be 90% effective at preventing COVID-19. The data comes after the vaccine was tested on 43,500 people. More to come.— CBC News Alerts (@CBCAlerts) November 9, 2020
Pfizer says early evidence suggests its vaccine may be 90% effective at preventing COVID-19. The data comes after the vaccine was tested on 43,500 people. More to come.