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Needing documents to travel is nothing new — after all, checking in for a flight requires some form of ID, and if you’re bound for somewhere foreign, it’ll have to be a passport. The same goes for car or train trips that cross the U.S. border, where from 2023 you’ll need that blue booklet or a state-issued Real ID.
But a passport to simply check into a hotel or board a cruise ship? It’s a distinct possibility in this age of pandemic-related restrictions. The idea of so-called vaccine passports proving inoculation against