NPR: As vaccination apps catch on, some require more data than others

NPR: As vaccination apps catch on, some require more data than others. “Showing proof of vaccination is becoming more routine in places like New York City and Los Angeles. And while your vaccination card will usually get you into, say, a restaurant, big venues are starting to ask people to use phone apps. NPR’s Martin Kaste reports on one app that’s quickly gaining ground, even as privacy experts raise concerns.”

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