I was at the hair stylist today and we were talking about my cruise, etc. One lady said I was crazy to go on a cruise, I'd get sick.. (see my counter??) I told her I had the same chance of getting the Norwalk virus on board as I did going into a hospital, a nursing home, a school, etc ... It's not the cruise ship, it's the people who don't use care when they're sick, don't wash their hands, sneeze and cough all over everyone, etc....
My professor at school took samples of common areas for his health class..... just remember to wash your hands and keep the paper towel as you open the bathroom door to leave... you'd be grossed out if you realized how many people DON'T wash their hands. eeeeuuuu