aonk and Aveline - unfortunately PCR tests are not 100% guarantee, as they are usually taken 72 hours before departure. In the meantime, people could be infected and be incubating Covid before they get on board. From my own experience, it was only 48 hours between exposure (granddaughter) and slight symptoms and positive antigen test.
Most cruises will probably be Covid free, but with 100s of people, there is a real chance that one person might bring it on board.
HRT - Starting for the first time at age 66.


. Not a ship person, myself.