We had a bad experience in January of 2013, where 7 members of my family got sick at WDW. Sick, like we had to miss park days on a short 5 day vacation. Sick, like we had to leave 12 hours early and drive home during the middle of the night so the kids could hopefully rest easier. It was no fun. I had never been a parent who carried anti-bacterial gel, airbourne and vitamin C and all those other things. My husband was. After our bad experience, we did things "his way." I can tell you for a fact, we have been sick much less. We've been to WDW twice since then, and his routine is anti-bac gel after ALL rides. The kids generally take vitamin C during the trip. We make sure they wash their hands before eating. If we see them putting their hands near their mouths, we remind them not to. More anti- bac.