I'd leave him where he's at. Over 90% of people who have been contracting H1N1 influenza have been miserable for a few days and then get over it with no serious complications. Honestly, I think it's safer to stay in pre-school than it is to get in your car with him every day and risk having a serious car accident. I love those commercials where the little boy is wrapped in bubble wrap from head to toe and then the mom let's him go outside and play football. LOL. We can't keep children in a sterile bubble....we do the best that we can (eg vaccines, if available) and then live out our every day lives. HTH ~