Staying healthy on a cruise comes down to a handful of practical habits, most of which you can start before you even board. The biggest risks are gastrointestinal bugs like norovirus, respiratory infections that spread fast in close quarters, and seasickness. All three are largely preventable with the right preparation.
Handwashing Beats Hand Sanitizer
Norovirus is the illness most closely associated with cruise ships, and the single most important thing you can do to avoid it is wash your hands with soap and water for at least 20 seconds. This matters more than you might think: alcohol-based hand sanitizer does not work well against norovirus. The virus has a structure that resists alcohol, so the sanitizer dispensers stationed around the ship are a useful backup but not a replacement for actual handwashing.
Wash before every meal, after using the restroom, after touching railings and elevator buttons, and after returning from port excursions. It sounds simple because it is. The CDC lists handwashing as the most effective single prevention measure for norovirus.
Choose Sit-Down Dining Over Buffets
Buffets are one of the highlights of cruising, but they’re also a higher-risk setting for picking up a stomach bug. Guests at self-serve buffets are more likely to use their hands instead of serving utensils, and coughing or sneezing over open food trays is common. Sit-down restaurants where staff plate and serve your food individually are a safer bet.
If you do hit the buffet, go early. Food that’s been sitting under heat lamps for hours and handled by dozens of people carries more risk than a freshly stocked spread. Avoid anything that looks like it’s been sitting out a while, and wash your hands right before you eat, not just when you entered the dining area.
Get Your Vaccines Up to Date
Outbreaks of flu, COVID-19, and even chickenpox have all been reported on cruise ships. Thousands of people from different regions sharing enclosed spaces for days is an ideal setup for respiratory viruses to spread. Before your trip, make sure your routine vaccinations are current, get your annual flu shot, and stay up to date on COVID-19 vaccines. If you’re eligible for an RSV vaccine, that’s worth considering too.
For destination-specific risks, the CDC recommends scheduling a visit with a travel health specialist at least four to six weeks before departure. Ships that visit Caribbean, Central American, or Southeast Asian ports may dock in areas where mosquito-borne diseases like dengue, Zika, and malaria are a concern. Your provider can recommend vaccines or preventive medications based on your specific itinerary. Some ports, particularly in parts of Africa and South America, require proof of yellow fever vaccination for entry.
Preventing Seasickness
Seasickness can ruin a cruise faster than any virus. Your best defense starts with cabin selection: book a room at the center of the ship (midship) on a lower-to-middle deck. This is the area with the least motion, since it sits closest to the ship’s center of gravity. Higher decks near the bow or stern sway more dramatically in rough seas.
For medication, a prescription scopolamine patch applied behind the ear is the most effective option studied. In a controlled trial comparing it to over-the-counter alternatives and placebo, the patch provided significantly better protection against motion sickness. It needs to be applied at least 12 hours before you expect rough water, so plan ahead. Dry mouth is the most commonly reported side effect.
Over-the-counter options like meclizine (sold as Bonine or Dramamine Less Drowsy) are widely available but performed less impressively in the same trial. They’re still worth having on hand if you don’t have a prescription, and they should be taken about two hours before exposure.
If you prefer a natural approach, ginger has some evidence behind it. In a trial with naval cadets sailing in heavy seas, 1 gram of powdered ginger root significantly reduced vomiting and cold sweating compared to placebo, with a protection index of 72% against vomiting specifically. It was less effective for nausea and vertigo on its own. Ginger capsules are inexpensive and easy to pack. Acupressure wristbands are popular but have weaker clinical support.
Check Your Ship’s Inspection Score
The CDC’s Vessel Sanitation Program inspects cruise ships that dock at U.S. ports and assigns a score out of 100. A score of 86 or higher is considered satisfactory; 85 or lower is a failing grade. You can look up any specific ship’s most recent inspection score using the CDC’s online search tool before you book. Ships are scored on water quality, food preparation, pool maintenance, and overall hygiene practices. A consistently high score means the cruise line takes sanitation seriously. A ship that’s recently failed or barely passed deserves a closer look before you commit.
What to Pack for Prevention
A small health kit can make a real difference. Consider bringing:
- A pocket-sized hand soap or soap sheets: not every restroom on shore excursions will have soap available
- Ginger capsules or chews: 1 gram is the dose supported by research
- Over-the-counter motion sickness medication: even if you’ve never been seasick, conditions can change
- Insect repellent: essential for port stops in tropical regions where mosquito-borne diseases circulate
- Sunscreen and a reusable water bottle: dehydration and sunburn lower your immune defenses and compound seasickness
Smart Habits While Onboard
Beyond handwashing and food choices, a few daily habits reduce your risk. Stay hydrated, especially if you’re drinking alcohol, which is both dehydrating and can mask early symptoms of seasickness or illness. Get adequate sleep. Your immune system takes a measurable hit from sleep deprivation, and the temptation to stay up late every night on a cruise is real.
Avoid touching your face after contact with high-traffic surfaces like casino chips, handrails, and shared gym equipment. If someone in your travel group starts showing symptoms of vomiting or diarrhea, take it seriously. Norovirus is extraordinarily contagious, and a single sick person can spread it to dozens of others within hours. Isolation and aggressive handwashing are the only real containment tools available onboard.
If you do get sick, cruise ships carry more medical resources than most people expect. Larger ships typically staff two to three licensed doctors and three to five nurses around the clock, with equipment including X-ray machines, cardiac monitors, ventilators, and lab testing capabilities. Their primary goal is to stabilize patients and, when necessary, arrange evacuation to a shoreside hospital. Having travel insurance that covers medical evacuation is worth the cost for any cruise, especially itineraries with multiple sea days far from port.