Royal put out the requirements for the July/August sailings.
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Also, this is cool, Adventure of the Seas was in Port Canaveral yesterday to get the crew vaccinated, and the cruise director (Hugo Arenas) is there getting things ready and dropped a quick message for those starting out on the June 12th sailing out of Nassau:
Where did you get the letter that is posted? We're booked for July out of Galveston and haven't seen anything...will check with my wife to have her check her email account.