Pfizer testing third dose of vaccine to protect against coronavirus variants

Published February 25, 2021 12:00am ET



Pfizer has announced that it will be testing a third dose of its coronavirus vaccine to determine if it will offer better protection against variants of the virus.

“We believe that the third dose will raise the antibody response 10- to 20-fold," Pfizer CEO Albert Bourla said in an interview with NBC News.

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