You have to realize this is a very common virus, and why it is only the cruise ships we are hearing about it on is beyond me. 181,000 people get it in the United states every eyar, within the last week it's closed a hospital in Toronto, seven outbreaks in Iowa, and closed several schools in North Carolina and 29 people at a restaurant there, got 64 people at a Salt Lake City Buffet, etc, etc, etc. For some reason the news is making a huge deal out of a copuple of dozen people getting it on a ship, and not about the other cases that are coming up every day. Do a search at news.google.com on the Norwalk Vuris, you will be totally amazed at how many places this is infecting. Given some of the numbers, a dozen people on a cruise ship may be the safest place to be.

The CDC has also said that they believe it was brought on by a passenger and spread, not something that came from the ship.