Source of infection isolated in Qingdao

The COVID-19 outbreak in Qingdao, Shandong province, has been traced to two dock workers, officials said on Friday. It was spread through poor disinfection of a CT scanning room shared by patients with the novel coronavirus and other conditions at Qingdao Pulmonary Hospital, they said.

The outbreak prompted a campaign aiming to test the city's 11 million residents in five days.

Between Sunday and Tuesday, the city reported a cluster of 12 confirmed coronavirus cases.