Pfizer to test COVID-19 vaccine engineered for South African variant
The company is proposing to do a Phase I clinical trial of a booster shot of that prototype vaccine that it would test against a booster for the current vaccine.
A person walks past the Pfizer Headquarters building in the Manhattan borough of New York City, New York, U.S., December 7, 2020(photo credit: CARLO ALLEGRI/REUTERS)ByREUTERS
