Stomach Bug 2024 Symptoms In India. The initial symptoms of norovirus are vomiting and/or diarrhoea, which show up one or two days after exposure to the virus. Stomach viruses cause symptoms that typically include watery diarrhea, vomiting, and abdominal pain.
Signs of dehydration may also be observed. Diarrhea, vomiting, abdominal pain and abdominal cramps characterize gastroenteritis symptomatically.