Here is one of the expected problems for cruise lines.
It has been picked up on FR at:
https://freerepublic.com/focus/f-news/4018430/posts
NEW ORLEANS — Ten people aboard a Norwegian Cruise Line ship approaching New Orleans have tested positive for COVID-19, officials said Saturday night.
The Norwegian Breakaway had departed New Orleans on Nov. 28 and is due to return this weekend, According to Norwegian’s website, the company requires all passengers and crew members to have been vaccinated against the virus at least two weeks prior to departure.
I have friends on the Carnival Glory out of New Orleans left the same day ... a 14-day Panama cruise ...