Stomach Bug 2024 Map Download. Norovirus, the highly contagious stomach bug that causes vomiting and diarrhea, is still spreading in the united states. Norovirus is the most common cause of gastroenteritis worldwide.
Often called the “stomach bug,” the virus is the most common cause of vomiting and diarrhea from acute gastroenteritis among all age groups. The highly contagious virus generally causes gastrointestinal symptoms like vomiting, nausea, diarrhea and stomach pain.