Ships can and do spread the virus. Waterborne outbreak of norovirus is common. Can include water supply, pools and even the ice for drinks. Anytime you are in close proximity to 5000 other people there will be transfer of bacteria and virus. Norovirus is incredibly hard to contain and very easily transmitted. For most people it only lasts a couple of (terrible) days. Won't keep me away. I'm planning a cruise now!
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