As the vaccine rollout continues to accelerate and the broader US economy prepares to reopen, talk of vaccine verification apps has heated up.
원문출처 : https://www.cnn.com/2021/04/13/tech/vaccine-passport-apps-options/index.html
원문출처 : https://www.cnn.com/2021/04/13/tech/vaccine-passport-apps-options/index.html