I don’t know what cruise lines you choose, but I, or my family and friends have never been sick on a cruise
That’s amazing. Everyone I know who has taken a cruise has expected to get sick from it and is only rarely pleasantly surprised. I’ve been on most of the major cruise lines. Last one was Norweigan in 2015. My whole family came home sick, so did the entire ship. I was expecting it. So was everyone else.