A holiday on the high seas can be the ultimate in fun and relaxation. But it can also come with some unexpected health hazards.

Seasickness, slippery outdoor decks, and of course the dreaded infection norovirus are all a part of the cruise experience. Or at least they can be, if you don’t take steps to avoid them. Here are 14 common mistakes both new and seasoned cruisers make that can put their health at risk—and what you can do to ensure smooth sailing.

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