Stomach Flu In 2024. Norovirus is a common, highly contagious virus that causes nausea, vomiting, abdominal pains, cramps and diarrhea. The stomach flu (norovirus) is an acute form of gastroenteritis, or inflamed stomach or intestinal lining caused by a virus, bacteria or parasite.

Some foods and beverages may worsen nausea, vomiting, diarrhea, and other stomach flu symptoms. Outbreaks have been on the rise since january: