The U.S. kicked off an an unprecedented inoculation campaign this week with a COVID-19 vaccine from Pfizer and its German partner BioNTech. Another vaccine from Moderna, which was co-developed with ...

A recent study has provided the first side-by-side comparison of how three major COVID-19 vaccine types differ in triggering ...

Pfizer and BioNTech said Wednesday that initial lab tests show that the omicron variant partly escapes protection offered by the companies' two-dose regimen of their COVID-19 vaccine. However, those ...

SAN FRANCISCO (KGO) -- Pfizer has been training to distribute its vaccine since March. The process is the biggest logistical operation in American history. Within 24 hours of the FDA's greenlight, 2.9 ...

The Food and Drug Administration on Monday issued full approval to the two-dose Pfizer COVID-19 vaccine. “The FDA’s approval of this vaccine is a milestone as we continue to battle the COVID-19 ...

PHILADELPHIA -- To help fend off another wave of Covid-19, people will need a fourth dose of vaccine, Pfizer CEO Albert Bourla said Sunday. "Many variants are coming, and Omicron was the first one ...

Pfizer says kid-size doses of its COVID-19 vaccine are safe and nearly 91% effective at preventing infections in elementary school children. Details of the study were posted online Friday. FDA ...

Multiple companies and organizations have announced early results about their COVID-19 vaccines. Here's what we know about ...