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.

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 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.

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.

Cases of norovirus, also known as food poisoning or the stomach bug, have picked up steam across the U.S. The number of suspected or confirmed outbreaks skyrocketed at the end of 2024, with more ...

Health care providers are not required by law to report norovirus cases to the state health department, so the data reflect estimates from schools, long-term care facilities and day cares.

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.

The brief but miserable symptoms have no treatment except hydration and rest. Doctors have several tips on how to stop the spread.

Norovirus cases are on the rise across the country, and Nova Scotia is no exception. The provincial health authority says although it does not track the exact number of cases locally, anecdotally doctors have seen an increase this season.

What’s worse, there’s no real treatment for norovirus beyond getting plenty of rest and constant fluids infused with electrolytes. The virus typically only lasts one to three days, but they are miserable ones, according to Van Sickels.

Wisconsin Public Radio If you or someone in your family has been sick with a “stomach bug” lately, you’re not alone. Norovirus cases