Now that the federal government is recommending that many COVID-vaccinated Americans receive booster shots starting this fall, it’s important to know what a “booster” is and how it differs from a ...

A third dose of the Pfizer/BioNTech COVID-19 vaccine can "strongly" boost protection against the delta variant -- beyond the protection afforded by the standard two doses, suggests new data released ...

If you've been hopping between arms for booster shots, a new study suggests that your lymph nodes remember exactly where you first got jabbed and perform far better when you return to that same arm.

A measles outbreak that began in January has sickened hundreds of people, with smaller outbreaks and scattered cases across the U.S., from Florida to Alaska. At least two children have died. With ...

CHICAGO (WLS) -- As some people are just getting their first shot, the federal government is discussing a plan for all vaccinated Americans to get their third shot at least eight months after their ...

NEW BRUNSWICK, N.J. -- Booster doses of Johnson & Johnson's one-shot coronavirus vaccine generated a big spike in antibodies, the frontline immune system defenses against infection, the company ...

Video above: FDA votes to authorize more COVID-19 boosters, mix-and-matching doses in some casesA booster dose of the Pfizer/BioNTech coronavirus vaccine was found to have a high efficacy — 95.6% — ...

Moderna is urging the US Food and Drug Administration to authorize a half-size booster of its Covid-19 vaccine, according to a briefing document posted Tuesday, ahead of a key meeting of the agency's ...