A norovious outbreak at a California shelter housing Los Angeles fire evacuees has left 28 sick. The virulent illness norovirus spreads easily in close quarters, causing diarrhea, vomiting and stomach

The misery of the common stomach flu may be coming to an end. Pharmaceutical company Moderna has launched a large-scale Phase III trial that will test out a vaccine against norovirus, a frequent and sometimes dangerous source of food poisoning.

Norovirus spreads very easily, and people may still be contagious even a week or two after recovering. The main danger is dehydration. No drugs cure norovirus.

First came the fires. Then, there was ash and contaminated water. Now, some survivors of the Southern California wildfires are dealing with outbreaks of norovirus and other stomach ailments at a shelter set up to help evacuees.

Norovirus infections jumped a stomach-turning 159% last month compared to the same span last year in NYC, where flu cases are also up nearly 25% so far in 2025, city Department of Health data reveal. There were 1,264 norovirus cases last month in Gotham, compared to 488 in December 2023.

Rates of norovirus in that CDC system have reached levels at or above last season's peak in all regions of the country. Norovirus test positivity rates look to be the worst in the Midwest, in a grouping of states spanning Kansas through Michigan.

The Pasadena Public Health Department said they will support the American Red Cross and onsite medical teams following a Norovirus outbreak at the city's evacuation center.

Three people have tested positive for norovirus amid a cluster of 28, the Pasadena Public Health Department said on Friday.

You can also get norovirus by touching objects or surfaces that are contaminated and then putting your hands in your mouth without washing them first. Hand-washing with soap and water is key, as hand sanitizer will not do the trick in the case of norovirus, experts say.

No. Hand sanitizer is simply not as effective against norovirus as it at killing other pathogens due to the virus's firm shell, Dr. William Schaffner, professor of infectious diseases at Vanderbilt University Medical Center, told TODAY.com recently.

Norovirus, also known as the stomach bug, is spreading across the U.S. Here's what to know about the contagious virus and how best to prevent an infection.