Cruise ships are universes of their own, with restaurants, casinos, waterslides and race tracks. Packing thousands of passengers into confined spaces, sometimes for weeks or even months, can heighten the risk of spreading contagious diseases.
What to do if you get sick on a cruise
What to know about medical facilities, doctors and emergencies on cruise ships

“On cruise ships, probably the biggest thing we worry about is communicable disease,” Scott said. “How do we keep our crew members, our guests and the residents of the countries that we visit, how do we keep them all healthy and safe?”
Major cruise lines follow health and sanitation standards to keep passengers safe on board, including regular cleaning throughout cabins, restaurants, snack areas, pools and elevators. Ships are also subject to at least two unannounced annual inspections in partnership with the CDC and three or more formal public health reviews, according to the Cruise Lines International Association.
Passengers should prepare for the possibility that they may get sick on their voyage, such as by purchasing travel insurance that covers medical costs, visiting a doctor beforehand to assess medical risks or packing extra medication.
As major cruise lines prepare for peak booking season, here’s what to expect if you find yourself sick on a ship.