Airlines and others in the travel industry are throwing their support behind vaccine passports to boost pandemic-depressed travel, and authorities in Europe could embrace the idea quickly enough for the peak summer vacation season. Technology companies and travel-related trade groups are developing and testing various versions of the passports. It is not clear, however, whether any of the ones under development will be accepted broadly around the world, and the result could be confusion among travelers and disappointment for the travel industry. by AP)
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