Only thing other than the common cold DD has picked up is Rotavirus, and that was pretty much impossible to avoid. My niece's son stayed the night at our house and apparently was carrying it, woke up in the morning on our couch and had...pretty much sprayed the couch with liquid poop. Tried our best to clean it and sanitize it, but with a mess like that, and my DD being 2, it was a no win, she was definitely going to come in contact with some of the germs left behind on the couch. It wasn't a bad case though, nothing like some of the horror stories I read, and certainly not as bad as my nephew had it. Just a week of runny, stinky poop, no vomiting at all even.
Even when she does get a cold, it doesn't seem to hamper her at all. She's sniffly and congested for a day or two, but still as energetic as ever. She's been getting sick less since I instituted a routine. If we go somewhere and any of us touch something that other germy people have probably touched (which is pretty much everywhere), we carry hand sanitizer with us, wash our hands as soon as we get home, take a dose of probiotic (we have strawberry probiotic chewables my DD loves), and Emergen-C for the adults, and airborne pixies (it's powdered airborne in a pixie-stick type package...only massive dose of C my DD will take willingly...we have her convinced it's candy, hah) for DD. So far, no full blown sickies. I might start feeling run down or get a sniffle, but I take some Emergen-C and I'm usually right as rain in the morning. My husband works with money in retail, and lordy...people just cough on their money, sneeze on him, cough right in his face sometimes! So before we started doing this he was bringing home every cough and cold known to man.