NEW YORK, N.Y. — Pfizer announced Wednesday that data shows a third dose of its COVID-19 vaccine can “strongly” boost protection against the highly transmissible delta variant. The pharmaceutical and ...

LOS ANGELES (KABC) -- While overall COVID-19 rates remain relatively low in Southern California amid continuing vaccination efforts, officials are increasingly worried about a growing threat from the ...

Pfizer's CEO is expressing confidence about the efficacy of his company's COVID-19 vaccine against the Delta variant, which was first discovered in India and has America's top scientists sounding the ...

Newly released data from Pfizer/BioNTech’s ongoing study of their COVID-19 vaccine suggests it is effective at preventing serious symptoms and death at least six months after vaccination. The ...

New research suggests that Pfizer’s COVID-19 vaccine can protect against a mutation found in two highly contagious variants of the coronavirus that erupted in Britain and South Africa. Those variants ...

NEW YORK (Reuters) – Pfizer Inc and BioNTech’s COVID-19 vaccine appeared to lose only a small bit of effectiveness against an engineered virus with three key mutations from the new coronavirus variant ...

AUSTIN (KXAN) — We’re learning more about exactly how the Pfizer COVID-19 vaccine works from research scientists at the University of Texas at Austin who helped develop it. “The way the Pfizer vaccine ...

Pfizer CEO Albert Bourla said people will "likely" need a booster dose of a COVID-19 vaccine within 12 months of getting fully vaccinated. His comments were made public Thursday but were taped April 1 ...