That is just one of the many things that will surface.
I am sure right now LAWYERS are reading up on how to make civil rights violation cases- for profit of course. -Tom
With vaccination, there is written proof easy to read for the cruise ship entry, with date of vaccination. And that passenger/crew has anti-bodies currently.
With pervious recovery, there is no paper record of how many anti-bodies you still have and the ship can’t wait to sail until that issue is processed and determined. It takes time to make a anti-body test and get results.