Covid is the shot in the news right now, but.....
I was recently on another board, and a poster there, based in the Caribbean Islands, mentioned that he always carried his vaccination card, which had a Yellow Fever inoculations in it. That was mandatory for some of his destinations. He does not publish his home base, but it seems to be the eastern end of the island chain.
Frank is probably our expert on this subject, and can post what he has for the Islands he visits, plus some more general information on some others.
What are the modern requirements?
Norman