Stomach Flu Symptoms 2024 Symptoms. Often wrongly called the “stomach flu,” norovirus sickens tens of millions of americans annually. Outbreaks of norovirus, which causes vomiting and diarrhea, are on the rise.
What are the symptoms of gastroenteritis? The main symptom of gastroenteritis is diarrhea, which may be accompanied by nausea and vomiting.