Pfizer says its vaccine booster restores full protection against COVID-19

WASHINGTON, Oct. 22: Pfizer and BioNTech announced Thursday that a large-scale trial of their COVID-19 vaccine booster showed it restored full protection against the disease.

In a Phase 3 randomized, controlled trial, a Pfizer-BioNTech booster dose was administered to more than 10,000 individuals 16 years of age and older, who previously received the Pfizer-BioNTech primary two-dose series.