The Latest: Pfizer studying effects of 3rd vaccine dose
|
February 25, 2021 5:15 AM
NEW YORK -- Pfizer announced Thursday that it has begun studying a third dose of its COVID-19 vaccine, part of a strategy to guard against mutated versions of the coronavirus.
Become a Subscriber!
You have read all of your free articles this month. Select a plan below to start your subscription today.
Already a subscriber? Login
