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The Biden administration will continue to require travelers to wear masks on planes and other forms of public transport,.

People who get infected with omicron are less likely to go to the hospital, go on a ventilator or die. But with the current huge volume of patients, hospitals are still struggling to treat them all.

The delta variant is pummeling America's hospitals, taxing an already-depleted health care workforce. Once again, some states are facing the prospect of rationing medical care.

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.

People with weakened immune systems who already got two doses of the Pfizer or Moderna COVID-19 vaccines can now get a third shot. But exactly who is eligible? Here's what we know so far.

The FDA amended its emergency use authorizations for the Pfizer and Moderna vaccines to allow for an additional dose for some immunocompromised people.

Until recently, plants from only one U.S. facility were approved for use in research. Adding new suppliers will accelerate understanding of cannabis' health effects and possible therapeutic uses.

Many Americans are still making sense of new CDC guidance that vaccinated people no longer have to wear masks in most indoor settings.

With older adults vaccinated, doctors say a growing share of their COVID-19 patients are in their 20s, 30s, 40s and 50s, as more contagious variants circulate among people who are still unvaccinated.

Researchers have quantified the price paid for fast-spreading COVID-19 infections. Patients who might have survived otherwise perished in crowded ICUs.