You’ve booked the cruise, paid the deposit, and then a news alert appears: a norovirus outbreak on a cruise ship. Maybe it’s your ship, maybe it’s another vessel entirely. Either way, you might wonder whether to cancel or just wash your hands more often and roll with it.
As a frequent cruiser, I’ve dealt with this scenario, and I've seen firsthand that it can lead to a few different outcomes.
Before you decide what to do, I put together a primer on what you need to know about an outbreak, what it means for your cruise sailing, and how to best protect yourself.
In this article
What is Norovirus?
Norovirus is an extremely contagious virus that typically causes vomiting and diarrhea. It spreads through contaminated food or surfaces and through direct contact with an infected person.
“Norovirus is not limited to cruise ships,” Dr. Amita Gupta, a professor of infectious diseases at Johns Hopkins School of Medicine, says. “It circulates widely in communities, including schools, healthcare facilities and restaurants.”
Gupta said cruise ships account for about 1% of reported norovirus outbreaks, but norovirus causes more than 90% of cruise ship diarrheal disease outbreaks with an identified cause. Ship outbreaks attract attention, she added, “because cases are closely monitored and shared spaces can make transmission easier.”
Ships must report gastrointestinal illness outbreaks under the Centers for Disease Control and Prevention’s Vessel Sanitation Program, established in the 1970s and applicable to vessels carrying 13 or more passengers on international itineraries that stop at U.S. ports.
What a Cruise Ship Norovirus Outbreak Means
An outbreak is generally posted when at least 3 percent of passengers or crew experience qualifying gastrointestinal symptoms during a sailing, a CDC spokesperson told Travel Bulletin.
This threshold triggers reporting and response measures, and doesn’t necessarily mean that the ship is unusually dirty.
Cruise ships also undergo regular, unannounced CDC inspections that cover sanitation practices, food preparation, drinking water, medical facilities, and swimming pools. These inspections help ensure cruise lines are following established health and safety protocols. If you're particularly curious, you can look up a cruise ship’s sanitation score and outbreak history.
What Happens Onboard During a Norovirus Outbreak?
In the event of a Norovirus outbreak, cruise lines must activate their outbreak response plans and take steps to control the spread.
These typically include increased cleaning and disinfection, isolating sick passengers and crew, and collecting samples for testing.
“We work with ship staff and the cruise line to determine the cause of the illness,” the CDC spokesperson says. “We ask for logs and records, including gastrointestinal illness surveillance logs.”
The logs track reports of symptoms among passengers and crew, helping identify potential outbreaks and monitor the spread of illness onboard.
Depending on the outbreak's severity, additional precautions may include notifying port authorities, delaying boarding for the next sailing, or deep-cleaning the cruise terminal.
What to Do if You Get Sick on a Cruise
Although gastrointestinal illness outbreaks do occur at sea, the risk of getting sick on a sailing is relatively low. It’s still important to know what to do if symptoms develop.
Gupta advises passengers with norovirus symptoms to notify the ship’s medical center promptly, even if symptoms are mild, and follow isolation and other shipboard infection-control instructions. “Early notification supports detection and control,” Gupta adds.
What to Know Before You Sail
Before booking, check the CDC’s cruise ship outbreak page, which lists reported gastrointestinal illness outbreaks. You can also contact your cruise line with questions about your specific sailing.
Cruise lines rarely offer refunds or rebooking solely because of an outbreak, so review the cancellation policy and check what your travel insurance covers.
Pack any necessary medications in your carry-on, and talk with your doctor before sailing if you have a weakened immune system or other health concerns.
The Shortcut
A CDC outbreak posting doesn’t automatically mean your next cruise is unsafe. It refers to a specific voyage and its reported cases.
If you develop vomiting or diarrhea onboard, contact the ship’s medical center promptly. Follow instructions about isolation and infection control.
Soap and water beat hand sanitizer alone for norovirus prevention. Wash for at least 20 seconds, especially before eating and after using the bathroom.
Don’t assume you can cancel for a full refund. Check your cruise-line contract and travel insurance policy before making a decision.
