China's Qingdao Covid cluster traced back to two dock workers, officials say

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.

source https://www.cnn.com/2020/10/16/asia/qingdao-china-covid-dock-worker-intl-hnk/index.html