Hey all. I will start this post off with the disclaimer that I am not a doctor nor do I have any special medical training. That being said, I’m sick and tired of cruise ships getting a bad rep over the Norovirus and it being unique to cruise ships. I’ve seen posts on the Cruise Critic message boards talking about the Norovirus and whether its OK to go on a cruise out of fear of getting this dreaded bug. The simple fact is that I would bet most people have had a type of Norovirus at some point in their life whether they ever stepped foot on board a ship. There is support for the statement that upwards of 90% of certain types of epidemic non-bacterial outbreaks of gastroenteritis around the world are from the Norovirus. The important word in that statement to me is gastroenteritis which is basically a stomach flu. In other words, the Norovirus is basically the stomach flu.
A brief history is in order. The virus, its actually a bunch of related viruses, got its name after an outbreak in Norwalk, Ohio. The virus seems most easily transmitted through food and human to human contact.
Contrary to popular opinion, the virus is not unique to cruise ships but is most commonly found in catered meals. In fact, cruise ships was bunched together with vacation settings and was the smallest percentage of reported outbreaks investigated at 10%. The idea that there is a “sick ship” syndrome is a creature of an overactive media. Even if a ship does suffer an outbreak, I’ve never heard of more than 17% of the total ship population being infected. In other words, if there are 5,000 passengers and crew on board (not impossible given today’s megaships), you’re looking at maybe 850 sick people. Certainly not fun, but it is also not the end of the world.
If you assume that there are approximately 5 outbreaks on all cruise ships per year (which is conservative given the number of reported outbreaks between 1997-2000 identified here) the odds of getting a ship that actually experiences an outbreak are so small to make it hard to count. For example, Royal Caribbean Cruises have I think 21 ships currently in service. Most of those are between 7-10 days but there are others that are 3 and 4 days. If one assumes that the entire fleet makes a total of 30 cruises per year (probably a low number) then you have 630 total voyages just on Royal Caribbean ships. If you have 5 outbreaks worldwide on all cruiselines per year and even if all those outbreaks were on Royal Caribbean Ships, you still only have a .7% (that is point seven percent) chance of getting on an infected ship. And that is just one cruise line getting all the outbreaks for an industry that serves approximately 12 million passengers in a year. In other words, I would think you’d probably have a better shot at getting struck by lightning then contracting the Norovirus on a cruise ship.
My advice to people who are thinking about a cruise and won’t do it because of the Norovirus is for them to lighten up and just wash their hands.