Wash your hands, wash your hands, wash your hands!
Those antibacterial alcohol thingies are not all they're cracked up to be, but at least they are something. The purpose of hand-washing is to remove the germs from the hands via the running water, you don't even need antibacterial soap! All the use of antibacterial stuff is only making germs mutate and become immune to them! Tell your kids, wash your hands whenever you can, as often as you can! And, take Vitamin C EVERY DAY! You cannot overdose on it, what you don't use will be eliminated the next time you go tinkle! If your child is in Elementary school, send in some Lysol with your child and a note to the teacher...
Getting sick stinks, but just think of the immunities your child is building whilst missing out on his/her studies, lol!