Stomach Flu May 2024. The stomach flu (norovirus) is an acute form of gastroenteritis, or inflamed stomach or intestinal lining caused by a virus, bacteria or parasite. The time depends on which virus is causing your illness.
Outbreaks surged this winter after the holidays, but cases of the nasty. The highly contagious virus generally causes gastrointestinal symptoms like vomiting, nausea,.