We have never been on a cruise before and had no idea the rules for travel were different than other types of holiday. I'm a stickler for checking all the details before booking but family booked on my behalf so wasn't involved. I'm gutted, the rules seem unnecessary, having the vaccine makes you less likely to get ill but does not prevent you catching or spreading covid. My son is a healthy 12 year old who would have 1 vaccine and been pretty well protected IMHO 🤷♀️