That is not my problem now that there’s a vaccine available. Get vaccinated if you’re worried about catching it and don’t allow anyone who can’t get it yet in the ship. It’s as simple as that.
Just answering your question. ;-)
Also, they can’t require vaccinations and they are trying to avoid a break-out on the ship. So the are between a rock and a hard place with people that are refusing and the FL law not allowing them to require it. I think they are dealing with the hand they have been dealt in the best way possible….