I think it's one of those statistic things, where if you look at the news it sounds likely, but in reality compared to the number of trips its as dangerous as driving a car. Like shark attacks, or killer bacon.Or a flu/norovirus doesn't infect everyone... or an engine fails. Seems like every year, two or three ships experience some kind of extreme poop/vomit crisis. But, err.... I’m sure you’ll have a great time.