A coronavirus outbreak in the Chinese city of Qingdao, which prompted mass testing of millions of residents, has been traced back to two dock workers, authorities said on Friday.
원문출처 : https://www.cnn.com/2020/10/16/asia/qingdao-china-covid-dock-worker-intl-hnk/index.html
원문출처 : https://www.cnn.com/2020/10/16/asia/qingdao-china-covid-dock-worker-intl-hnk/index.html