Stomach Flu May 2025. Find info on norovirus symptoms, causes, prevention, current outbreaks, and reporting systems. What norovirus isn't, however, is the stomach flu โ despite what you might read or hear to the contrary.
The stomach flu (norovirus) is an acute form of gastroenteritis, or inflamed stomach or intestinal lining caused by a virus, bacteria or parasite. What to know about the 2025 norovirus season in the us, symptoms, and prevention.