The chief executive of Phizer Inc. said Sunday that the pharmaceutical giant should know if its experimental COVID-19 vaccine works by the end of October — and if approved, it could be distributed in the U.S. by the end of the year.
The chief executive of Phizer Inc. said Sunday that the pharmaceutical giant should know if its experimental COVID-19 vaccine works by the end of October — and if approved, it could be distributed in the U.S. by the end of the year.