COVID-19 activity is rising in much of the country. Data shows overall respiratory virus spread is very low in the U.S. But ...

There's a new surge in Covid cases - partly thanks to a fast-spreading new variant that has a wide range of almost ...

A new COVID-19 variant, known as XFG and nicknamed “Stratus,” has quickly become the dominant strain in the United States, ...

The “Stratus” variant (XFG) was first identified in January in Southeast Asia. By June, it accounted for 14% of COVID cases ...

The latest figures from Ireland's Health Protection Surveillance Centre (HPSC) show the variant's share of confirmed cases ...