COVID-19: Pfizer Says Vaccine 95% Effective
The biotech company Pfizer said Wednesday that a completed study of its experimental Covid-19 vaccine showed it is 95 percent effective. Pfizer said the vaccine had no serious side effects…
The biotech company Pfizer said Wednesday that a completed study of its experimental Covid-19 vaccine showed it is 95 percent effective. Pfizer said the vaccine had no serious side effects…