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 ...

There were an estimated 47 million to 82 million flu illnesses in the United States between October 2024 and May 2025.

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 ...