Certificates with QR codes would serve as proof that a person has either been vaccinated against COVID-19, received a negative test result or recovered from the disease.
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Laurel Wamsley is a reporter for NPR's News Desk. She reports breaking news for NPR's digital coverage, newscasts, and news magazines, as well as occasional features. She was also the lead reporter for NPR's coverage of the 2019 Women's World Cup in France.