Anyone thinking a vaccine will quickly end the coronavirus pandemic shouldn't get their hopes up. Instead, they should wear a mask -- which is probably even more effective, the head of the Centers for Disease Control and Prevention said.
원문출처 : https://www.cnn.com/2020/09/16/health/us-coronavirus-wednesday/index.html
원문출처 : https://www.cnn.com/2020/09/16/health/us-coronavirus-wednesday/index.html