• Covid 'viral blizzard' is about to hit the US
원문출처 : https://www.cnn.com/2021/12/17/health/covid-omicron-what-can-the-world-learn-cmd-intl/index.html
원문출처 : https://www.cnn.com/2021/12/17/health/covid-omicron-what-can-the-world-learn-cmd-intl/index.html