The 499 illnesses occurred on the Ruby Princess and Crown Princess . In a statement released by Royal Caribbean International, the cruise line said it was "deeply saddened" to learn of the deaths but that its "thoughts are with all those affected. Norovirus can cause diarrhea , vomiting and stomach pain .
The 499 illnesses occurred on the Ruby Princess and Crown Princess . Princess Cruises is working with investigators to find the cause . Norovirus can cause diarrhea , vomiting and stomach pain .