Maybe so, but it cerrtainly seems that these are more than isolated cases on the cruise ships, and certanly more than a few dozen people affected.

Nearly 200 passengers ill after Carnival cruise:

http://www.miami.com/mld/miami/4649287.htm

Also:

Federal officials say there is no evidence that bioterrorists are behind the spate of gastrointestinal illnesses that have plagued cruise ships.

Norwalk-like viruses have infected more than 1,000 people on cruise ships in the past few months. On Monday, a Carnival cruise ship returned from a three-day voyage carrying more than 170 people sickened by a gastrointestinal virus similar to those experienced by other cruise liners. It was not yet known whether they, too, had the Norwalk virus.

http://www.washingtonpost.com/wp-dyn...-2002Dec2.html

[This message has been edited by cactuspete (edited 12-03-2002).]