While hopes of vaccinating 20 million people by New Year's Day sputtered out, the US now faces staggering new challenges in the fight against Covid-19.
원문출처 : https://www.cnn.com/2021/01/04/health/us-coronavirus-monday/index.html
원문출처 : https://www.cnn.com/2021/01/04/health/us-coronavirus-monday/index.html