A year after being hospitalized with COVID-19, only about 25% of people felt fully recovered, a new study shows, and the risk of long COVID was highest among women, obese people and those who were on a ventilator.

There are no specific treatments for

The Biden administration on Wednesday appealed a Florida ruling that struck down a federal mask mandate for planes, trains and other forms of public transportation.

The announcement, made by the U.S. Centers for Disease Control and Prevention, came after the agency deemed the manda...

A fully vaccinated health care worker got COVID-19 twice in less than a month - the shortest known time between infections, Spanish researchers report.

The 31-year-old was infected with the Omicron variant just 21 days after catching the Delta variant.

"This case highlights the potential of the Omicron variant to evade the previous immunity acquired either from a natural infection w...

A prior COVID-19 infection may provide unvaccinated adults with as much immunity against reinfection as the Pfizer-BioNTech or Moderna mRNA vaccines, new research suggests.

However, the study was conducted before the surge of the highly transmissible Omicron variant.

"We found that...

Nearly 9 in 10 children ages 5-11 who were hospitalized for COVID-19 from mid-December to late February were unvaccinated, a rate that was two times higher than for vaccinated children, a new government study shows.

Researchers from the U.S. Centers for Disease Control and Prevention also found<...

The U.S. Department of Justice said Tuesday that it will appeal a Florida judge's ruling that struck down a federal mask mandate on airplanes and other forms of public transportation only if the U.S. Centers for Disease Control and Prevention determines such a mandate is still needed.

"The Department of Justice [DOJ] and the Centers for Disease Control and Prevention disagree with the dis...

A new forecasting center for infectious diseases was officially launched by the U.S. Centers for Disease Control and Prevention on Tuesday.

The goal of the Center for Forecasting and Outbreak Analytics is to act as a "National Weather Service" for infectious disease outbreaks, and to guide public health decisions during outbreaks. These can include developing vaccines, distributing antivi...

Moderna Inc. announced Tuesday that an updated COVID booster shot that combines Moderna's original vaccine with protection against the Beta variant appears more effective than current booster shots against Omicron and a number of other variants.

Before the highly transmissible Omicron variant surfaced, Moderna was tweaking its original vaccine to provide added protection against the earli...

Fitness trackers can tell you how well you're sleeping, how fast you're walking and, of course, how many steps you've taken.

But during the pandemic, researchers have also investigated the ability of smart watches to help detect COVID-19 or provide data on recovery.

The latest study uses several measures of heart rate data to help track the progression of symptoms in someone wh...

At least four people in Michigan infected with a version of the coronavirus found mostly in mink are the first known cases of possible animal-to-human transmission of the virus in the United States.

The cases occurred in the first year of the pandemic and were confirmed Monday by the U.S. Centers for Disease Control and Prevention, The New York Times reported.

Two of t...

The heart inflammation that followed COVID-19 shots in some teens and young adults is rare and a new study affirms that your risk is extremely low.

Inflammation of the heart muscle (myoperic...

People with substance abuse disorders, depression and other mental health conditions may be at higher risk for COVID-19 -- even when they are fully vaccinated, new research suggests.

"Individuals with psychiatric disorders, and especially older adults with psychiatric disorders, may be particularly vulnerable to breakthrough infections," said study author Kristen Nishimi, a postdoctoral f...

COVID-19 is mainly known as a respiratory ailment, but a new study suggests the coronavirus can infect your intestinal tract for weeks and months after you've cleared the bug from your lungs.

In the study about 1 out of 7 COVID patients continued to shed the virus' genetic remnants in their feces at least four months after their initial diagnosis, long after they've stopped shedding the v...

Moderna's COVID-19 vaccine may have some slight advantages over the Pfizer shot, new research suggests.

For the study, researchers tracked antibody levels in 234 people for 10 months after they received either the two-dose Pfizer (114 people) or Moderna (114 people) mRNA vaccines,...

U.S. health care workers were most likely to be infected with COVID-19 at work during the pandemic's first year, according to a new study that challenges previous research suggesting their risk was highest off the job.

Researchers said their findings could help guide efforts to better protect ...

If you're one of the many people with long COVID, an expert offers advice on how to tackle it.

The first step: Give yourself time to recover.

"One thing we have seen repeatedly is that patients push themselves too hard while trying to recover. ...

As doctors learn more about COVID-19 infection, they are finding that in rare cases, it appears tied to a disturbing eye condition.

Retinal vein occlusion is a blockage of the small veins that carry blood away from the retina, which cau...

People who suspect they may have COVID-19 could soon find out with a simple breath test that delivers results in three minutes.

On Thursday, the U.S. Food and Drug Administration granted an emergency use authorization for a device called the InspectIR Covid-19 Breathalyzer. The test, which must be administered by a trained operator, demonstrates a high degree of accuracy while taking up n...

Rising coronavirus infections in New York state appear to be driven by two new versions of the Omicron BA.2 variant, and may explain why the state has been the national coronavirus hot spot in recent weeks, state health officials said Wednesday.

The two subvariants - called BA.2.12 ...

As the number of known coronavirus cases worldwide hit 500 million on Tuesday, health experts called for increased testing, vaccination and contact tracing.

There's been a sharp rise in known cases so far this year, from 300 million in early January to 400 million in early February and half a billion...