more tonight from gabe gutier z gutierrez. >> reporter: today, health officials from the centers for disease control boarded a cruise ship, struggling to contain a norovirus outbreak. >> i was one of them. >> she was one of them. >> it was awful. >> reporter: vomiting and diarrhea symptoms. >> it was a terrible experience. i've been on this boat before. we had an amazing time when we were here. this time, it's just been awful. >> reporter: after departing new jersey on tuesday, the ship bypassed a planned stop in haiti friday to be san advertised in puerto rico before moving on to st. thomas. sao panto, the mayor of eastern pennsylvania is on board, vacationing with his wife. he is not sick, but says other passengers have been quarantined in their rooms. >> lot of activity with cleaning and san advertising the various railings and elevator shafts. >> reporter: norovirus is a fast-moving stomach bug. each year, the cdc says it sickens 21 million people in the u.s. and kills up to 800.