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 ...

Some San Franciscans with health insurance can get the new COVID-19 booster as soon as Monday, while other local health-care providers are preparing to roll out updated shots later this month. Kaiser ...

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

Experts are concerned about a potential viral resurgence this fall, winter. With the end of summer nearing, and Labor Day around the corner, U.S. health officials are preparing to roll out millions of ...

The U.S. on Wednesday authorized its first update to COVID-19 vaccines, booster doses that target today's most common omicron strain. Shots could begin within days. The move by the Food and Drug ...

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 ...

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 ...

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 ...

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