If COVID-19 taught us anything it's that washing your hands is often the best thing to do to prevent the spread of infections, including norovirus.

Cases of norovirus, a highly contagious stomach bug, are surging in parts of the United States this winter, according to government data.

There’s currently no approved vaccine for norovirus, although Moderna has begun a phase three trial in the U.S. for a vaccine using mRNA technology and aims to test it in 25,000 adults worldwide. Norovirus causes about 200,000 deaths worldwide each year.

The Centers for Disease Control and Prevention has previously signaled that influenza A, COVID and RSV are on the rise across the U.S. Now, the risk of catching norovirus — more commonly known as the stomach flu — is escalating,

Here's what you need to know about norovirus, or the stomach flu. According to the CDC, "norovirus is a very contagious virus" that causes acute gastroenteritis, an inflammation of the stomach or intestines and leads to vomiting and diarrhea.

Norovirus, aka the stomach flu, is surging across the United States as 2025 begins. Here's what to know about norovirus symptoms, how it spreads, and prevention.

The common but contagious virus often pops up during colder months, and there's a nasty strain circulating this winter.

On the week of Dec. 5, the CDC reported 91 cases of the virus ― over double the highest number recorded between 2021 and 2024.