Sometimes called “the stomach flu” or “a stomach bug,” norovirus causes acute gastroenteritis, or an inflation of the stomach or intestines.

More than 1,900 people, mostly children, have been sickened by measles in the U.S. in 2025. The outbreaks are moving the ...

When you start to feel sick, it can be hard to tell which respiratory virus you’ve been hit with. The flu and COVID share a ...

Swift's appearance on "The Late Show" comes just one day before she releases an extended filmed version of "The Eras Tour" and her docuseries, "Taylor Swift: The End of an Era," which promises a ...

Norovirus, a common group of viruses causing gastroenteritis, is in its peak season. Here's how to avoid getting sick.

Along with COVID-19 and the flu, a separate, foodborne illness that triggers episodes of vomiting could be lurking at your holiday gatherings this year. Called the norovirus, you may hear it referred ...

Some students who remain unvaccinated are now in a second 21-day quarantine since the beginning of the school year.

The University of Waterloo research serves as a reminder that while the virus continues to evolve, updated vaccines remain highly effective, safe, and cost-saving—particularly for older adults.

NBC News medical contributor Dr. Natalie Azar joins TODAY to talk about how you can protect yourself from winter viruses, including the flu, COVID, RSV and norovirus. She breaks down how to tell the ...

A nasty, highly contagious virus is spreading across the country ahead of the holiday season — and it’s not the flu or Covid. Norovirus, also called the “winter vomiting disease,” has been rising ...

Nearly all adults carry Epstein–Barr virus—but new research reveals how it can hijack immune cells, sparking a chronic disease that attacks the body from within. This colorized transmission electron ...

The virus circulating this year is more virulent and has been spreading faster and earlier than usual. By Apoorva Mandavilli The United States may be headed for a rough flu season, with a virus that ...