Stomach Flu 2024 Symptoms Nhs. Norovirus is a highly contagious virus that causes vomiting and diarrhea, also known as the stomach bug or the stomach flu. Vomiting, which can be projectile;

Some people also have a slight fever,. Norovirus is a highly contagious virus that causes vomiting and diarrhea, also known as the stomach bug or the stomach flu.