Symptoms usually develop between 12 to 48 hours after a person is exposed to norovirus. It is also possible for someone to never show symptoms of the virus but still be contagious. The most common symptoms include diarrhea, vomiting, nausea and stomach pain. Less common but still possible are fever, headache and body aches.

Noroviruses, also known as food poisoning or the stomach bug, are “ common and highly contagious ,” according to the National Foundation for Infectious Diseases. About 1 in 15 people across the U.S. get the virus annually, experts said.

On the week of Dec. 5, the CDC reported 91 cases of the virus ― over double the highest number recorded between 2021 and 2024.

The number of national norovirus outbreaks was the highest seen in December since at least 2012. Experts suggest increased hand-washing to avoid catching the ultra-contagious stomach bug.

The Centers for Disease Control and Prevention has previously signaled that influenza A, COVID and RSV are on the rise across the U.S. Now, the risk of catching norovirus — more commonly known as the stomach flu — is escalating,

UHS Wilson Medical Center was recently on a diversion due to high patient volume. Broome County Health Department called it "the perfect storm."