Teach them how to wash their hands properly. Carry hand sanitizer. You don't want to sterilize every surface, necessarily, because getting colds does help build up their immunity, but hand hygiene is very important. Also, teach them to cover their coughs and sneezes so they're less likely to spread the joy. Don't let them play with the toys at the doctor's office, they're crawling with germs.
at 12:27 AM on Dec. 5, 2010