Taking a cruise may feel like a floating escape, but it’s also a uniquely complex environment for keeping yourself and your family healthy.
That’s why Miguel Cabada, MD, MSc, an infectious disease specialist at The University of Texas Medical Branch (UTMB Health), offers guidance to help travelers stay healthy while visiting ports of call around the world. It all starts with prevention and awareness before and during the trip.
Plan for medical needs
Even before booking, Cabada recommends that travelers understand how onboard medical care works. Most cruise ships have a clinic staffed by a licensed physician and medical team, but many passengers may not realize that medical care is not included in the ticket price.
“Prepare for any medical care you might need before you get on the ship,” he said. “You might be outside the U.S., in international waters, so consider purchasing insurance with international health coverage for emergencies and evacuation.”
Once onboard, it may take days to reach a port, meaning the ship's medical staff may be your only option for care.
“This is why preparation is necessary. Make sure your age- and condition-appropriate vaccines are up to date for preventable illnesses such as flu, COVID-19, and respiratory syncytial virus (RSV), particularly in pregnant people and those with weakened immune systems,” he said.
He added that travelers with chronic conditions, such as lung diseases requiring oxygen, should plan for equipment needs and backups.
Understand health risks at each port
Cruise itineraries often include multiple countries, and each destination carries its own health considerations.
“If there is malaria where you’re going, you might need to bring medication, and if there is yellow fever, there is a vaccine for that,” he explained.
Seasonality can also shift with geography. Travelers heading to the Southern Hemisphere, for example, may encounter influenza activity at times when it is not circulating at home.
“There are places where these viruses are transmitted year-round,” he said.
Common illnesses on cruise ships
Because of close contact among passengers, respiratory illnesses are the most common onboard health issue. These viruses spread easily from person to person, especially in shared spaces. On board a ship, nearly all spaces are shared.
Cruise travel also introduces a cycle of exposure: Passengers disembark at ports, encounter new environments, and then return to the ship.
Gastrointestinal illnesses are a major concern. While some cases stem from overindulgence, most gastroenteritis outbreaks are caused by norovirus, which leads to severe nausea, vomiting, and diarrhea.
“Even a very small number of viral particles can cause infection,” he said. “It can spread through surfaces, food contamination, or person-to-person contact. It doesn’t take much, and you can get sick very fast.”
Norovirus outbreaks can affect large numbers of passengers and are difficult to control because the virus resists many disinfectants, including alcohol-based hand sanitizers.
“You should wash your hands frequently, but use soap and water,” he advised.
Injuries and motion-related risks
Not all health concerns are infectious. Injuries rank second among common cruise-related issues.
“Being more active than at home and trying new activities like rock climbing or ziplining, which they may not be used to, may lead to falls and injuries,” Cabada said. “Add in a bit more alcohol than usual, dancing, or seasickness, and people can become unsteady.”
Falls and accidents are common, especially among passengers adjusting to the ship’s motion.
Do your research and pack smart
Cabada recommends reviewing ship inspection scores from the U.S. Centers for Disease Control and Prevention, which maintains reports for vessels departing United States ports. Travelers can also check for past outbreak histories. Once onboard, passengers should report illness promptly so the crew can implement containment protocols.
Packing a personal medical kit is important, including prescription medications, antidiarrheal medicine, pain relievers, and insect repellent containing up to 30% DEET.
A healthier trip starts with preparation
Cruise vacations offer the chance to explore the world, but they also require extra awareness. From pretravel planning and vaccinations to smart choices onboard and at port, small steps can make a significant difference.
“Preparation is key,” Cabada said. “When you plan ahead and stay aware of your surroundings, you can focus on enjoying your trip — not recovering from it.”