A.C.
I think trying to prevent every sniffle or sneeze is going to make them sicker in the long run. They need to be exposed to some stuff to learn to fight it off. My DD washes her hands after a potty stop. That's about it (unless they're dirty). We don't do sanitizer. No vitimins. She goes outside all the time, plays with kids (even the ones with runny noses), licks the shopping cart (OK, even I think that is nasty) but in the end, she's never sick. She learned to fight the stuff. Good luck! :)