On my cruise ship from Feb-24th through 29th, I did not hear anybody talking about corona virus. They were all too busy eating, drinking and watching the live entertainment. I never saw any of the 3000+ people on ship wearing masks. However when we got off the ship, I saw a few people in port wearing masks. There are 300+ cruise ships prowling the oceans every week. That is = 1200+ cruises every month. So far only 3 had news of infections.
I didn’t go on cruise ships before CV. They are sickness factories and sound boring.
Don’t ask, don’t tell. If it weren’t for the dead guy they shoved in the fridge, they might have gotten away with it on the first ship.