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

Anyone can get infected and sick with norovirus,” the CDC explains. According to the most recent CDC data, more than 12% of tests for the virus came back positive in the week ending on Feb. 17.

First, the good news: While food poisoning symptoms can linger for up to a week, Dr. Dasgupta says most cases clear up in a ...

Norovirus cases have risen in recent months, ... the CDC recommends washing vegetables and fruits carefully and cooking oysters and other shellfish to a minimum internal temperature of 145 degrees.

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.

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 ...

Between Aug. 1, 2022, and Jan. 8, 2023, the CDC recorded 225 norovirus outbreaks — a 31% increase from last year’s count of 172 during the same period.

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 ...

Shanna Miko, a nurse epidemiologist at CDC, was part of the field team on the Pacific Crest Trail study — and it wasn't her first norovirus-in-the-woods investigation.

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.