Reliable detection of Win98 may not be possible. But it's not really the flu. Gastroenteritis is a stomach illness. Nausea is the sick feeling you have before you throw up.
Diarrhea means having runny or watery bowel movements .
A healthy person who gets gastroenteritis will feel pretty sick, but it usually doesn't last more than a day or 2. There is no vaccine for gastroenteritis. If you have it, the best thing to do is rest in bed. If you vomit, don't eat any solid food right away. Drink sips of ginger ale, water, or chew on small ice chips instead.