I don't think so. Why isn't this happening on the west coast? Both coasts run their operations the same, same 3rd world staff on each coast, same supply methods, etc. The water supplied through distillation. And why isn't everyone on board getting ill? My guess is the passengers are picking up the bug at a common port of call (s). It does no good to sterilize the ship when the ship isn't the source of the infection. Then again there's always sympathy barfing theroy. Is CNN available on cabin televisions?
So far, most of the terrorism has been on the East coast. Terrorists arrested around NY, NJ, Florida...