Pfizer says early data signals COVID-19 vaccine is 90% effective
Pfizer says an early peek at its vaccine data suggests the shots may be 90% effective at preventing COVID-19. But Monday's announcement doesn't mean a vaccine is imminent. |!| Port…
Pfizer says an early peek at its vaccine data suggests the shots may be 90% effective at preventing COVID-19. But Monday's announcement doesn't mean a vaccine is imminent. |!| Port…