Stomach Bug 2025r John 2025. The most common symptoms of norovirus are diarrhea, vomiting, nausea and stomach pain. Cases of norovirus, a highly contagious stomach virus, are surging in the united states.according to the centers for disease control and prevention (cdc), the week of.

This leads to vomiting, diarrhea, nausea, and. The stomach bug is not the flu.