Travel CDC monitoring 92 cruise ships for COVID. Here’s how to check whether your ship is on the list. December 29, 2021Morgan Hines and Eve Chen, USA TODAYComments Off on CDC monitoring 92 cruise ships for COVID. Here’s how to check whether your ship is on the list. The CDC has been dealing with COVID cases since cruises resumed sailings, but what does it mean when it marks a ship under investigation or monitored?