Some states are making great strides in vaccinating their residents against Covid-19, but the ones that are not may soon be contending with a more transmissible variant, experts say.
원문출처 : https://www.cnn.com/2021/06/21/us/us-coronavirus-monday/index.html
원문출처 : https://www.cnn.com/2021/06/21/us/us-coronavirus-monday/index.html