Will Stone

It's an ominous sign ahead of the holidays: coronavirus cases are again rising in the U.S. In some states, hospitals are already under siege with an influx of patients.

Colorado hospitals are on the verge of a crisis as COVID-19 cases are rising. New Mexico and Utah are not far behind.

An influential medical panel is cautioning older adults against taking a low dose of aspirin to prevent a first stroke or heart attack. It's a change in guidance for many Americans.

The U.S. is entering an uneasy stretch of the pandemic. Despite progress, the delta surge is dragging on in certain regions. Can vaccines ward off a big surge over the holidays?

Ahead of the holidays, coronavirus cases are down, but the U.S. remains stuck in a cycle of regional outbreaks, even in heavily vaccinated northern states. Can boosters and kids vaccines make a dent?

New research shows people with substance use disorders are significantly more vulnerable to a breakthrough infection of COVID-19.

You've seen the headlines about COVID boosters. But what does it all mean for you? Here's how to sort through the science and figure out if and when you need a booster and which one to get.

With high-profile stories of vaccinated people dying from COVID, how worried should you be about getting a serious breakthrough case? Here's how the data shake out.

A medical task force is changing its guidance on the use of aspirin to prevent cardiovascular disease. It says older Americans without heart disease should not start taking daily low dose aspirin.

America's hospitals are already strained from the delta surge. Now they fear they'll be further overwhelmed by pent-up demand for services and a potentially bad flu season.

What do we know about breakthrough infections in vaccinated people? Will Stone explains and shares the story of how surprised he was to get a breakthrough infection himself.

The FDA is set to rule on Pfizer boosters on Friday. Some scientists say they aren't needed for healthy people and the doses would more helpful for the unvaccinated in countries with limited supplies.

After a year and a half of being COVID-cautious, a fully vaccinated health journalist thought he could finally travel and socialize this summer. The resulting illness didn't feel "mild" at 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.

More than 100,000 people in the Unites States are in the hospital for COVID-19. Increasingly, states are again facing decisions about whether they have to ration care.

Worries about waning immunity and talk of COVID booster shots has some Americans checking their antibody levels to see if they're protected. But scientists warn blood tests don't tell the full story.

After a 90-day review, U.S investigators did not turn up any clear answer on whether the coronavirus hopped from an animal to a human — or somehow escaped from a lab.

It's not clear why some people who get COVID-19 are plagued with symptoms for many months after being infected, but scientists are investigating what's behind these "long haul" cases.

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.