WASHINGTON -- People with certain health conditions that make them moderately or severely immunocompromised may get a fourth mRNA COVID-19 shot, according to updated guidelines from the US Centers for ...

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 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 ...

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

The Food and Drug Administration today authorized both Pfizer and Moderna to give a second booster dose of their COVID-19 vaccines to individuals aged 50 and older and to those who are ...

WASHINGTON -- The US Food and Drug Administration gave the green light Monday to updated COVID-19 vaccines from Moderna and Pfizer/BioNTech amid rising cases and hospitalizations. Both vaccine ...

The US Centers for Disease Control and Prevention strengthened recommendations for booster doses of coronavirus vaccine Monday, saying all adults should get boosted six months after the second dose of ...

SAN JOSE, Calif. -- San Jose Mayor Sam Liccardo announced a proposal Tuesday to require city employees to get a COVID-19 booster vaccination as a condition of employment. The proposal would also apply ...

Researchers at University of Tsukuba have demonstrated that during Japan's COVID-19 booster vaccination campaign, online ...

The study found that individuals who received four or more COVID vaccine doses were less likely to contract flu-like ...