"As these viruses continue to evolve, public health officials watch carefully to see whether new strains will be more easily ...

Doctors across multiple countries are flagging a painful new COVID-19 symptom tied to a fast-spreading variant: a sore throat so severe that patients compare it to swallowing razor blades. The symptom ...

COVID-19 variant XFG accounted for 0% of U.S. cases in May. By late-June, it became the third-most common strain.

In fall 2025, rumors spread that the strain of the virus in circulation that causes COVID-19 had "very different signs" compared to other strains of the virus. Referring to it as "COVID-25," people ...

A sore throat that feels like swallowing glass—a.k.a. “razor-blade throat”—has become one of the most talked-about of the new COVID symptoms linked to Stratus, the strain of the virus driving new ...

Flu has overtaken covid in infections and hospitalizations during the winter respiratory virus season, and their virulence is becoming similar.

PITTSBURGH, Pa. — Where biology meets technology, researchers are on the hunt for mutations of COVID-19. The Microbial Genome Sequencing Center, also known as MiGS, is one of several in the country ...

A new and more contagious strain of the coronavirus that was first discovered in the United Kingdom could force New York into another economic shutdown if it spreads unchecked and weakens the state's ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. On Tuesday, officials in Colorado announced ...

NEW YORK -- This holiday season held promise for Americans, many of whom spent Christmas 2020 in quarantine or away from loved ones due to a nasty winter COVID-19 surge. Yet in the last week or so, ...