Cruise ships are inspected, just like restaurants. (There’s probably more to check on a ship.) So, if you’re one of those people that likes to check the restaurant scores from the local sanitation department before your visit, you would be interested in the Vessel Sanitation Program (VSP.) The VSP is administered by the US Center for Disease Control and Prevention (the CDC.)
All scores are public information. You can review the inspection results and any follow-up reports here:
https://wwwn.cdc.gov/InspectionQueryTool/InspectionSearch.aspx
A passing score is an 86 which is a lot stricter than when I was in school. There are a lot of items that are checked, so there are a lot of places to go wrong, but some things are more serious than others.
There is also general information for cruise passengers available here:
https://www.cdc.gov/nceh/vsp/public/public.htm
If you just want the poop (ha!) on current disease outbreaks, go here:
https://www.cdc.gov/nceh/vsp/surv/gilist.htm#2019
Next time you go on a cruise, see how clean you ship is first!