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.

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 ...

The CDC reported 91 norovirus outbreaks the week of Dec. 5, up from 69 the week before. By comparison, up to 41 outbreaks were reported during that same week the previous three seasons.

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.

Norovirus has been linked to twelve outbreaks on cruise ships in 2025, sickening nearly 1,500 people, according to CDC data.

As norovirus outbreaks surge on cruises, here's how the CDC says passengers should protect themselves. Thus far in 2025, the CDC has issued notifications on 16 separate cruise outbreaks, outpacing ...

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 ...