Pfizer says early COVID-19 vaccine data show 90% efficacy rate
Pfizer says early COVID-19 vaccine data show 90% efficacy rate

As cases of coronavirus in the U.S. surpass the 10 million mark, Pfizer says early vaccine data suggests the shots may be 90% effective at preventing COVID-19, indicating the company is on track later this month to file an emergency use application with U.S. regulators.