I just looked back to the CDC board and read the interview with Dave Forney, Chief of CDC's Vessel Sanitation Program and Dr. Marc Adrain Widdowson, an Epidemiologist with the CDC. An interesting point from the interview is that it is generally felt that the Virus is passed person to person. The investigation is showing the spread of this disease has been caused mostly by passenger to passenger. That this viurs is somewhat common, however because a cruise ship is so contained, that person to person contact happens more often. Dr Widdowson states that the same Norwalk virus is also seen for intance in schools and hospitals. In fact, it mentions that food prep and storage is in check. The best way to handle this problem is prevention. Dr. Widdowson states that is so very important to wash hands properly and often.