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.

The U.S. is seeing a "quad-demic" as cases of COVID-19, flu, RSV and norovirus spread at the same time. Experts said this is what you need to know.

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.

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.

The cases mark the fourth norovirus outbreak on Holland America ships since early December, following others on its Eurodam, Rotterdam and Zuiderdam vessels. Other companies, including Cunard Line and Princess Cruises also saw outbreaks in recent weeks.

Don gloves. It is necessary to wear gloves while cleaning during and after a bout of norovirus, and to wash your hands after removing and disposing of the gloves. “Even if you are wearing gloves, wash your hands for a full 20 seconds with soap and water after cleaning,” Ek says.

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.

Multiple norovirus outbreaks have been reported in Chicago during the month of January, the Chicago Department of Public Health confirmed this week.

Over the last few months, the UK Health Security Agency has issued warnings after a surge in cases of the highly contagious bug. Norovirus, which has also been nicknamed the 'winter vomiting bug', is a virus that mainly causes vomiting and diarrhoea.

Households are also urged to frequently and thoroughly wash their hands with soap and water before eating or preparing food, after using the toilet and after an episode of illness, as it can help stop the virus from spreading.

Norovirus is one of those nasty winter bugs that just does not relent. It can survive even the most potent of hand gels, as well as freezing temperatures, and it takes as few as 10 viral particles to make you sick.