If your cruise calls at any ports in tropical South America, Africa, eastern Panama, or Trinidad, it is likely that you will require proof that you have been immunised against Yellow Fever and if so, need to remember to carry the inoculation certificate with you on your cruise.
For details on Yellow Fever in countries on your itinerary, please visit this website.
Please note, that you must visit your GP to ascertain if you need, and it is safe for you to receive, a Yellow Fever vaccination. If your GP considers it is not safe for you to have the vaccination, they may provide you with an exemption letter, which you must bring with you on the cruise.
Please see here for details on cruising and Coronavirus vaccination policies.