Johnson & Johnson said that when it gave study participants a second jab after six months, their antibody levels were nine times higher than they were 28 days after a first dose of the COVID vaccine.

The FDA announced the Pfizer vaccine is the first in the U.S. that is now fully approved. Here's what that means for vaccine mandates and convincing vaccine-hesitant people to get vaccinated.

Michigan resident Christine Duval won $2 million as part of a sweepstakes campaign in the state to encourage people to get vaccinated.

Some kids are getting sick or passing the coronavirus to vaccinated family and friends. It's all unnerving to many parents. "It felt like a terrible head cold," one dad says. "My brain was foggy."

The approval replaces the emergency use authorizations granted last December and could make it easier for employers, the military and universities to mandate vaccination.

FDA gives full approval to Pfizer's COVID-19 vaccine, a highly anticipated move that could give the nation's vaccination campaign a badly needed boost.

If all goes to plan, Americans who got Pfizer or Moderna shots can get a third dose eight months after their last jab. Here's why health officials think you'll need one.

For students at Foust Elementary in Greensboro, an outdoor classroom is helping smooth the transition to in-person lessons.

People will be eligible for a booster shot eight months after their second dose of their vaccines from Pfizer or Moderna, according to U.S. health officials.

Mask mandates and other interventions can help stop a surge, even where vaccination rates are low, say scientists who've reviewed states' data. When the measures start and how long they last matters.

A COVID-19 vaccine for children younger than 12 is not yet available, but research is well underway and the first shot for some kids in this age group is expected in the fall, doctors say.

Tangtang Zhao, 34, allegedly sold 125 authentic Centers for Disease Control and Prevention vaccination cards to 11 buyers in March and April.

The Republican Texas governor, who has been fully vaccinated and has no symptoms, "will isolate in the Governor's Mansion and continue to test daily," his office announced.

With the delta variant spreading, more companies are mandating that employees be vaccinated against the coronavirus, but some are still hoping bonuses will do the trick.

When the Las Vegas Raiders start their NFL season, the team wants its home stadium to look as normal as possible, with stands full of fans. Those who been vaccinated won't have to wear masks.