For many people who have “recovered” from COVID-19, the illness lingers as brain fog: forgotten appointments, lost words ...

A common drug may be able to cure a common illness. Around one in four people have developed long-haul symptoms of COVID-19, ...

ST. LOUIS — Five years have passed since the World Health Organization declared COVID-19 a global pandemic, unleashing an unforgettable chain of events. It was an ordeal the U.S. had not endured in ...

A simple blood test might determine which patients are at risk for long COVID, a new study says. Higher levels of leukocytes -- a form of white blood cell -- are associated with more severe symptoms ...

The variant is officially named XFG but is being called Stratus. It was first found in Southeast Asia in January, and at the time was 0% of cases in the U.S., but by the end of June, it was about 14% ...