Moderna vaccine

The third COVID-19 vaccine authorized for use in the U.S. requires one shot instead of two, and works a slightly different way from the others. Here's what we know about its safety and effectiveness.

The country music icon, who is 75, shares a video of herself getting vaccinated in which she riffs off her hit song "Jolene" and urges those eligible to get their shots, too.

After getting one dose of the COVID-19 vaccine, some people are having trouble getting their second shot. Here's how to maximize the likelihood you'll get both doses, to be fully immunized.

"We've now purchased enough vaccine supplies to vaccinate all Americans," Biden said on Thursday. "Now we're working to get those vaccines into the arms of millions of people."

Low initial vaccine uptake among staffers in nursing homes has ignited debates about whether to penalize, persuade or simply pay them more to get the vaccine. But a little patience might work best.

The spread of new strains raises new questions as two COVID-19 vaccines continue their rollout across the U.S. and another vaccine candidate preps for regulatory review. Here's what you need to know.

Steven Brandenburg, the Wisconsin pharmacist who admitted to removing some 570 doses of the Moderna vaccine from cold storage last month, has been charged with attempted criminal damage to property.

Maine says it received vaccines with "the thermometer on the outside of the boxes ... [showing] that at some point the required minimum temperature had been exceeded."

It takes time after vaccination for immunity to the virus to build up, and no vaccine is 100% effective. Plus, scientists don't yet know if the vaccine stops viral spread. Here's what's known so far.

"Now we are working at full speed to approve it & make it available in the EU," said EU Commission President Ursula von der Leyen. It is be the second vaccine to get EU authorization.