Between flying and having two toddlers, I am pretty much immune to most of everything. Every once in a while I'll get a little cold, knock me out for a day or two, but I generally recover pretty quickly. That and a ton of Mucinex.For those who fly a lot, how do you keep from getting sick after being in those flying petri dishes for so long? The odds have to catch up to you sooner or later being so close to so many people.