Earlier quoted context omitted.
I’ve always been curious about that, why do cruise ships always get hit with gastro? I rarely hear about it but when I do it’s on a cruise ship.
-Thousands of passengers from all over the world, (comparatively) cramped quarters, HVAC systems push air from cabin to cabin without sterilisation, buffets where hundreds handle the same serving utensils...
I suspect this is actually a bigger part of it than people realise.
I've been in very modern hotels that clearly had issues with their HVAC design as smells (bathroom smells... yuck!) from other rooms infiltrated through the ventilation ducts. I imagine this issue could be worse in a cruise ship given the small size of the cabins.