During the week of Dec. 5, the CDC reported 91 cases of norovirus, more commonly known as the stomach flu, which is over double the highest number recorded between 2021 and 2024.

The norovirus is a highly contagious virus that is currently the leading cause of vomiting, diarrhea and food-borne illness within the U.S., the CDC says. Based on data gathered by the CDC ...

CDC Reports Rise in Norovirus Cases. The CDC has reported 91 outbreaks during the week of December 5, up from an average of 65 during the same period from 2012 to 2020.

Norovirus, often coined the "cruise ship virus," causes more than 90% of diarrheal disease outbreaks on cruise ships, according to the CDC. Still, norovirus outbreaks on cruise ships account for ...

Norovirus outbreaks on cruise ships are spiking in 2025, with 16 reported incidents so far, ... according to CDC records. Norovirus was also the cause in many of those cases.

A CDC spokesperson said the agency is monitoring norovirus outbreaks through its CaliciNet laboratory database and pointed to a surge of GII.17 strains in Asia and Europe in 2014 that was followed ...

So far this year, there have been 16 illness outbreaks reported on cruise ships in the CDC's jurisdiction, mostly from norovirus, compared with 18 outbreaks in all of 2024 and 14 in 2023, VSP ...

According to the CDC, norovirus is the leading cause of foodborne illness in the United States, responsible for 58% of such infections acquired in the country each year.

The CDC notes that norovirus can found in both vomit and feces "even before you start feeling sick." "The virus can also stay in your poop for 2 weeks or more after you feel better.

Norovirus, also known as food poisoning or the stomach bug, is a highly contagious virus that causes inflammation of the stomach or intestines, per the CDC. "Norovirus, also known as Norwalk-like ...

With the decrease of GII.4 outbreaks since 2024, whether GII.17 viruses will continue to cause an earlier onset of the norovirus season cannot yet be determined," the CDC researchers wrote.