The CDC randomly inspects cruise ships to prevent the spread of stomach viruses. Of the 119 it's reviewed this year, two have received failing scores.
Crystal Serenity — Crystal Cruises, scored 89 (inspected February 3)
Carnival Elation — Carnival Cruise Line, scored 89 (inspected March 14)
Adventure of the Seas — Royal Caribbean International, scored 89 (inspected January 23)
National Geographic Sea Bird — Lindblad Expeditions, scored 88 (inspected July 25)
Carnival Miracle — Carnival Cruise Line, scored 88 (inspected April 21)
MSC Magnifica — MSC Cruises, scored 86 (inspected May 17)
Evrima — Ritz-Carlton Yacht Collection, scored 86 (inspected February 9)
Carnival Breeze — Carnival Cruise Line, scored 86 (inspected March 21)
Caribbean Princess — Princess Cruises, scored 86 (inspected March 20)
Hanseatic Inspiration — Hapag-Lloyd Cruises, scored 62 (inspected September 29)