My wife and I caught norovirus, likely on the trip home from a vacation that we took several years ago. Within 24 hours of getting home, we both had the most horrible stomach upset and diarrhea. We both had to stay home from work for a few extra days once we got home. I must have been in the toilet no less than 30 times in a single day. We drank plenty of water and fluids, and ate a small amount of easy to digest food, like bananas, rice, and ramen noodles. After 3-4 days we felt back to normal. Tired, literally wrung out, but normal.