Cruise Out of Control: The 13 Worst Norovirus Outbreaks on Cruise Ships

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With the latest report of a stomach bug sickening more than 600 people on a Royal Caribbean cruise ship, we took a look at similar recent outbreaks on cruises and found more than a dozen in just the last five years.

While the ill passengers aboard the Royal Caribbean ship haven’t been officially diagnosed yet, according to the Centers for Disease Control (CDC), the 577 passengers and 49 crew members who are sick to their stomachs, vomiting and experiencing diarrhea are likely infected with norovirus. The virus affects the stomach and intestines and can be ingested from contaminated food or water; contact with an infected person can also spread the infection (and that carrier may not even know he is spreading the disease, since it can take up to two weeks for symptoms to appear). Once they do, they aren’t pretty. And the virus can spread quickly, especially in small, contained spaces like a cruise ship.

In some cases, it can spread through unsanitary bathroom practices, since the microbe resides in the feces. But the CDC says it’s nearly  impossible to determine if outbreaks were caused by infected people who board a ship, or by contaminated food or water. The agency has a task force called the Vessel Sanitation Program that requires any ship visiting foreign ports and carrying more than 13 passengers to submit to two random sanitation inspections per year. When outbreaks occur, the CDC responds, sending a scientist on board to take samples for testing and to monitor sanitation procedures.

So have these VSP experts come up with any best practices to protect future cruise ship passengers from unpleasant experiences? It’s probably a good idea to avoid raw and uncooked shellfish, or any other food and water that doesn’t smell fresh or shows signs of being possibly contaminated. Washing your hands — a lot — and staying clear of public surfaces like toilets and door handles could also help.

And if you’re still considering a cruise in the coming months and wondering how likely it is that you will run into norovirus, we thought you should be armed with the latest on the most recent outbreaks, listed from worst to…still a serious vacation downer.

1. Royal Caribbean Cruise LineExplorer of the Seas
Current number sick (including both passengers and crew members): 626
The ship is currently on its way to dock in New Jersey. CDC members are on board to monitor the cases and advise the cruise line on its response. The CEO of Royal Caribbean Cruises Ltd. told NBC News that the company screens its passengers for visible signs of illness as best they can and that their personnel has reacted as quickly as possible to the problem.

2. Celebrity CruisesMercury (February 2010)
Total number sick: 443
“I never had anything like this,” Kenneth Thompson a 71-year-old from Concord, S.C. told NBC News about his vomiting symptoms on the cruise. “It just came out of me in streams, just gushes of it.”

3. Celebrity CruisesMercury (March 2010)
Total number sick: 419
A second Celebrity Cruise ship is harbors norovirus, one month later, raising concerns about the line’s sanitation practices.

4. Princess CruisesCrown Princess (January 2010)
Total number sick: 396
In 2010, there were 14 outbreaks of illnesses on ships , including this one. Eight were attributed to norovirus.

5. Princess CruisesCrown Princess (February 2012)
Total number sick: 363
The cruise, which embarked just a month after another outbreak on the ship, returned to Ft. Lauderdale two days early as passengers started falling ill.

6. Celebrity Cruise LinesCelebrity Summit (September 2013)
Total number sick: 335
Many of the infected experienced severe stomach pains along with vomiting and diarrhea and were confined to their cabins to prevent spread of the virus.  In 2013, the CDC reports that there were nine cases of widespread illness on cruises, and seven were caused by norovirus.

7. Fred Olsen Cruise LinesBalmoral (January 2010)
Total number sick: 310
The world cruise started in Dover, England and after visiting several countries, was supposed to finish the trip in Los Angeles, California. Fifteen days before reaching L.A., the first of the 293 passengers and 17 crew who were infected started getting sick.

8. Princess CruisesRuby Princess (March 2013)
Total number sick: 276
The cruise returned from what was a week long trip in the Eastern Caribbean to Fort Lauderdale, Fla. New passengers scheduled on the next cruise were not allowed on the ship until the CDC finished a required sanitation assessment.

9. Princess CruisesCoral Princess (February 2009)
Number sick: 271
This cruise also had the distinction of sickening passengers with E. coli as well as norovirus.

10. Carnival Cruise LineCarnival Liberty (April 2009)
Total number sick: 265
The ship was cleaned and disinfected when it pulled into Miami, causing a delay for the next set of passengers.

11. Royal Caribbean Cruise LineVoyager of the Seas (January 2012)
Total number sick: 259
Several sick tourists were quarantined while the ship was delayed at various ports to sanitize.

12. Cunard LineQueen Mary 2 (December 2012)
Total number sick: 220
All the tables and seating on this trip had to be sanitized and disinfected before the crew served the buffet meals, and crew members reported any cases of gastrointestinal illness to the CDC twice a day.

13. Princess CruisesSun Princess (July 2012)
Total number sick: 216
As with the other major outbreaks, two CDC VSP members boarded the ship to conduct health assessments and gauge how the situation was being contained. Many passengers on the ship provided stool samples for testing, which helped to verify norovirus as the cause.


Once upon a time a cruise was a world of gaiety, comfort and relaxation such as no other form of travel provided. It was a rarefied world of glamor, hospitality and elegance. Now dream vacations have turned into Grimm Brothers nightmares.


Is it really the fault of the cruise lines. I have been on a fair few cruise ships and have always been impressed at the hygiene levels on board. Far cleaner I might add than many hotels I have stayed in or more importantly Hospitals I have visited. I do not think that the cruise companies can be held solely responsible when I have witnessed first hand people pretending to use sanitiser as they enter dining areas or waiting until they think the staff are occupied so that they can slip by.  I have seen people coming out of the toilet and not washing their hands and worse still have overheard conversations between other guests where they openly admit they are ill but refuse to say anything as they do not want to stay confined to their cabin for a day or two. These precautions are put in place for a reason, to protect the other passengers and crew. Who is truly responsible for these outbreaks or more importantly for the way in which they spread on board. I think we need to take a long hard look in the mirror as it is us, the guests who need to re-think our own actions. 


Its due to the Close proximity with the cabins and all the enclosed areas, plus the fact a lot of people are just not hygienic i.e. washing there hands and using the sanitisation stations. Plus if something does not look right with the food don't eat it and make someone aware.


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I never heard of anything like these incidents during "The Golden Age" of transatlantic voyages in the last century.  Why is that ?


The problem is the foreigners on board, like crew members their idea of clean is not up to our standards. Some of them are just pigs. cruseing is a wonderful vacation, but this will continue to happen as long as the cruise lines keep hiring some of these filthy crew members. I have been on 21 great cruses with no problem. My family and i have been lucky i guess, keep washing those hands, but that does not help to much with this kind of virus.