Stomach Flu Symptoms 2024 Nhs. The stomach flu is an unpleasant experience marked by gastrointestinal symptoms. The stages of the stomach flu may vary in intensity and duration depending on factors like your overall health status, ongoing hydration efforts, and the virus that caused the symptoms.
Here are symptoms to watch for and how to avoid getting sick. Flu will often get better on its own, but it can make some people seriously ill.