While most cruise lines take extra precautions as far as cleanliness and hand sanitizer stations are concerned, it's unfortunately pretty inevitable that people who are on vacation and constantly drinking, swimming, and touching everything in sight are not exactly the cleanest of guests. Then, when you add in the fact that everyone is stuck on a moving vessel with watertight compartments in the middle of the ocean, things can get pretty reckless. Screaming kids peeing in the pool? Drunk people taking their bathing suits off to throw up over the side of the ship? Strange food storage habits and below deck staff secrets? Cruises are a wonderland of dirt.
I was touring a ship for a future event. The ship was about to leave for a 100+ day cruise. I saw a lot of old people getting on with oxygen tanks. I asked him what happens if they die on board. He said it was very common for old people blow their life savings to come spend their last days on this cruise. He also said they have a fully functional morgue. - Crusha79