I just disembarked Royal Caribbean’s Freedom of the Seas, the line’s first cruise ship to sail from a U.S. port in more than 15 months. When I arrived at the Port of Miami, I had to pass through a checkpoint. At this checkpoint, an agent told me that if I wanted to present a vaccine card, now was the time to do so. I showed mine and the agent gave me a purple rubber bracelet to wear. Passengers who didn’t voluntarily show proof of vaccination, were directed to a testing area. In the testing area, they were each given an...