Do you need a negative covid test to cruise if you have been vaccinated?

This question is specific to: Cruises

YES. All guests must follow the country’s travel requirements which may include presenting a negative PCR test result within 72- 120 hours of arrival. Prior to booking, please consult all applicable U.S. Centers for Disease Control travel advisories, warnings, or recommendations relating to cruise travel, at 

Currently, the U.S. requires proof of a negative COVID-19 test result for those arriving into the U.S. by international air.  

Royal Caribbean will administer an antigen test onboard the ship, and cover the related cost, should it be required for re-entry into the United States. The test will be administered just before the end of the cruise, and guests will be provided a copy of their test results. 

Celebrity will test guests before they disembark