Practice good hygiene
Both norovirus—a group of gastrointestinal viruses not caused by food poisoning that used to be called Norwalk viruses—and influenza are transmitted readily by touch. “All it takes is one passenger with norovirus to infect everyone else,” says Keystone. After all, there are thousands of people crammed onto a cruise ship, who also aim to be social and participate in meals and activities together. He adds that outbreaks of measles and rubella can occur on cruise ships as well, because some staff from developing countries are not immunized.
“Wash your hands five times a day, which is what you are supposed to do anyway,” says Keystone. “Really, safe travel is about using common sense. It might not make you 100 percent invulnerable, but it will reduce the chance of something bad happening by 70 or 80 percent.”