Whether it's ships or barracks this is how the 1918 flu killed more Americans than world War I did

Anywhere people cannot isolate enough coronavirus is going to knock groups down worldwide whether it is militaries of the world or prisons or dormatories like universities or anywhere groups live together in large numbers like in communes around the world. Wherever you have large groups of people sharing kitchens and living spaces they are literally death traps for some of those people.