Norovirus is not a form of influenza but rather a calicivirus.New strains appear every two to four years, and are "difficult to wipe out because they can withstand hot and cold temperatures as ...

It’s very hard to grow a norovirus in the lab, so for a while, scientists used another virus from the same family—feline calicivirus, which can give a cat a cold—as a stand-in for their ...

As if cold and flu season weren't bad enough, this winter is turning out to be a particularly bad one for stomach bugs. By Dec. 11, 495 outbreaks of norovirus had been reported nationwide ...

A common stomach bug is surging, according to new data from the US Centers for Disease Control and Prevention. In the week of December 5, there were 91 outbreaks of norovirus reported, up from 69 ...

Norovirus outbreaks occur most frequently during the winter months and are most common in congregate settings such as schools, military barracks, nursing homes, cruise ships and, of course ...

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

Norovirus is responsible for about 109,000 hospitalizations and 900 deaths each year in the U.S., mostly affecting adults over 65 years old, according to the National Foundation for Infectious ...

Norovirus is a highly contagious stomach bug spreading in Colorado and throughout the U.S. Here's what you should know about symptoms and prevention.

Norovirus has been linked to twelve outbreaks on cruise ships in 2025, sickening nearly 1,500 people, according to CDC data. The Trump administration says the ‘end game’ for tariffs is to ...

An exclusive look at the world's largest cruise ship 02:05. Hundreds of cruise passengers and workers fell ill with norovirus on three different ships this month, the Centers for Disease Control ...

CNN: What exactly is norovirus? Dr. Leana Wen: Norovirus is the leading cause of foodborne illness in the US. According to the CDC, it is responsible for 19 million to 21 million illnesses every year.