The XFG COVID-19 variant, aka "Stratus," is spreading rapidly in the U.S. as cases climb. Here's what to know about symptoms ...

Here’s what to know about the latest COVID strain — and how to tell if your at-home test is still good to use.

Since July, the southern Chinese province of Guangdong has reported more than 10,000 cases of chikungunya fever, the largest ...

The new updated COVID-19 vaccines for 2025-2026 will be available in the fall. Here are answers to some of the most common ...

Confirmed COVID-19 cases are up in some states, according to CDC data. Here's what to know the week of Sept. 8.