Here is my tip: Use lots of hand sanitizer while on vacation. We would bath in the stuff if we could! Next, take off your shoes as you enter your room and leave the shoes by the door. Lysol your shoes every time you come back. I can't tell you how many times I have seen people be sick at the park and then others walk through it, not knowing it. Avoid placing your hands on hand rails. Finally, at the park, avoid walking through odd wet spots on the pavement. I don't know what those are, and don't really want to know. Some might say I'm being germaphobic. I say I am just being observant.