The Food and Drug Administration greenlights the biotech firm's vaccine for emergency use in the U.S. The move bolsters a vast inoculation effort that's already underway.

Despite being founded a decade ago, Moderna has never had a product make it to market. And the company registered its first factory with the Food and Drug Administration just this week.

Atlantic writer Ed Yong says the COVID-19 vaccination program will be the most complicated the U.S. has ever attempted: "It's going to be a slow process, and there are a lot of possible roadblocks."

The Food and Drug Administration says is advising health workers to use "every full dose obtainable" to help speed up the nationwide immunization campaign.

Fingertip devices that measure oxygen in the blood can sometimes give erroneous readings in people with dark skin, doctors report. The devices can say oxygen levels are normal when they're not.

In a survey by the Kaiser Family Foundation, 71% of respondents said they would definitely or probably get inoculated — a significant leap over the 63% who said so in an August/September poll.

States are starting to administer their first doses of Pfizer's newly FDA-authorized COVID-19 vaccine. It marks a new phase in the pandemic, but what's that mean for you?

What can you do when you fear someone you know may be considering suicide? It can feel daunting, but suicide prevention experts say we all can help someone at risk by reaching out and showing we care.

As the first patient to receive an experimental treatment that relied on the gene-editing technique CRISPR continues to do well 17 months later, more patients seem to be benefiting, too.

The power of family history can lead a person to do a lot of things. For Howard Berkes, the family tradition of facing crises head-on led him to sign up for experimental testing of a COVID-19 vaccine.

An administration spokesman said senior government officials would be among the first to get the vaccine, but the president himself later said that White House staff would get it later.

In the U.S., front-line health care workers are likely first in line to get immunized with a COVID-19 vaccine, once the FDA says yes. But what about the rest of us? Here's what we know so far.

A synthetic version of the psychedelic drug ibogaine appears to relieve depression and addiction without producing hallucinations or other dangerous side effects — at least in rodents.

This week’s Medical Minute, discusses efforts to counter the effect of weightlessness on bones and muscle during long space flights such as those planned for Mars.

Pfizer and BioNTech's vaccine is the first to receive an emergency authorization from the Food and Drug Administration. Officials say it may be ready for widespread inoculations within days.