Stomach Flu 2024 Symptoms Uk. Gastrointestinal infection that can be caused by a virus, bacterium, or parasite. The most common symptoms of norovirus are diarrhea, vomiting, stomach pain, and nausea.

Cases of norovirus, aka the stomach flu, continue to climb across the u.s. Norovirus is a stomach bug that can cause moderate to intense nausea, vomiting and diarrhoea.