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Irritable bowel syndrome, otherwise known as IBS, may be the result of an abdominal infection that triggers an allergic response, according to the New England Journal of Medicine

Cases of the omicron COVID-19 variant are being confirmed around the country this weekend.

The arrival of the omicron variant of the coronavirus in the U.S. has health officials in some communities reviving contact tracing operations in an attempt to slow and better understand its spread as scientists study how contagious it is and whether it can thwart vaccines.

Losing one's temper or exercising too rigorously could be contributing factors for a stroke, according to new research.

The omicron variant of COVID-19, which had been undetected in the U.S. before the middle of this week, had been discovered in at least five states by the end of Thursday, showing yet again how mutations of the virus can circumnavigate the globe with speed and ease.

South African scientists say the risk of reinfection from the omicron COVID-19 variant is at least three times higher than for previous variants.

People who suffer from allergic conditions have a lower risk for developing COVID-19, according to a new U.K. study.

Katrina Haydon can’t eat, shower or brush her teeth the same way she used to six months ago because of parosmia, a smell disorder sometimes associated with COVID-19 “long-haulers,” or people whose COVID symptoms last long after they test positive for the virus.

What’s the status of the COVID-19 vaccine mandate in the U.S.? It’s on hold indefinitely because of legal challenges, but employers can still require the shots.

The Minnesota Department of Health said Thursday that lab testing had confirmed the state’s first omicron COVID-19 case.

Here's what we know about the omicron variant of COVID-19 in the U.S. after its first case was announced Wednesday.

After two dozen countries have reported cases of the omicron variant, the European Union (EU) countries might be headed towards mandatory vaccination to fight the spread of COVID-19

Patients who had severe COVID-19 may be twice at risk of dying over the following year, compared to patients who had a mild or moderate case, or individuals not infected by novel coronavirus, according to a new study.

A traveler who returned to California from South Africa has become the first person in the United States identified to have the omicron variant of COVID-19, officials confirmed Wednesday.

More American adults are living alone, according to newly released estimates from the U.S. Census Bureau's annual America's Families and Living Arrangement table package.

Dr. Anthony Fauci, the top U.S. infectious disease expert, said Tuesday the COVID-19 pandemic has diverted scientific and financial resources from the fight against AIDS, seriously impeding global efforts to achieve the U.N. goal of ending AIDS by 2030.

In guidance released on international travel in relation to the COVID-19 omicron variant, the World Health Organization (WHO) wrote Tuesday that people ages 60 and older should delay travel to "areas with community transmission."

A panel of U.S. health advisers on Tuesday narrowly backed a closely watched COVID-19 pill from Merck, setting the stage for a likely authorization of the first drug that Americans could take at home to treat the coronavirus.

Cytalux (pafolacianince), a drug that binds to ovarian cancer tissue and glows when exposed to fluorescent light, has been approved by the U.S. Food and Drug Administration (FDA) to help surgeons detect ovarian tumors during surgical procedures in patients.

Government health advisers on Tuesday weighed the benefits and risks of a closely watched drug from Merck that could soon become the first U.S.-authorized pill for patients to take at home to treat COVID-19.