We went in mid-October and both my daughter and I contracted and tested positive for influenza A (Swine Flu aka H1N1). It was no big deal and we were actually less sick with H1N1 than with a common cold. We used Docs On Call -- a doctor service that comes to your hotel room and then has your prescriptions delivered to the front desk from a local pharmacy. The Docs on Call service was great. I had to pay cash for the visit (and it was a little pricey) but my insurance (Tricare Standard) still covered it at 90%. It was great! I started on Tamiflu one evening and was back at the park by mid-day the next day. I did everything in my power to prevent getting sick.... You name it... wiped everything down with Clorox wipes, used hand gel, washed hands all the time, etc. but if you around more people than normal then you are more likely to get sick.