My two daughters had the stomach flu (Seattle Area) just before Christmas break - but not too many (or none?) of their classmates did. Hit hard the first 24 hours, rested on the 2nd day and made it 1/2 day of school. But then it hit again but not too strong. Spent the next 3-4 days at home feeling lousy, vomiting rarely, not eating, but not real sick though either.