Protecting your health on a cruise requires a combination of proactive hygiene and environmental awareness. The most effective defense against common illnesses like Norovirus is frequent and thorough handwashing with soap and warm water for at least 20 seconds, especially before eating and after touching high-contact surfaces like stair railings or elevator buttons. While hand sanitizer stations are ubiquitous on ships, they are not a substitute for washing, as sanitizer is less effective against certain stomach viruses. To prevent respiratory issues, stay up to date on your flu and COVID-19 vaccinations before you sail, and consider wearing a mask in crowded indoor theaters or during embarkation. Staying hydrated is also crucial, but stick to bottled or filtered water in ports if you are in a region with questionable tap water. For seasickness, choose a cabin in the middle of the ship on a lower deck where there is less motion, and bring ginger-based remedies or over-the-counter medications like Meclizine. Lastly, always use the provided serving utensils at the buffet and avoid touching your face throughout the day.