Stomach Bug Symptoms 2024. Contagious stomach bug circulating in the northeast | know the symptoms. Commonly called the “stomach bug” or “stomach flu,” norovirus is the leading cause of vomiting and diarrhea from acute gastroenteritis, which is inflammation of the stomach and intestines.

Norovirus, sometimes referred to as a stomach flu or stomach bug, is a common virus that’s highly contagious and spreads through tiny particles of feces or. Signs and symptoms of norovirus infection may start suddenly and include: