A medical worker administers a dose of COVID-19 vaccine to a citizen at a community health center in Qingxiu District of Nanning, south China's Guangxi Zhuang Autonomous Region, Aug. 27, 2021. More than 2 billion doses of COVID-19 vaccines had been administered in China as of Thursday, with over 889 million people in the country fully vaccinated against the novel coronavirus, a health official said Friday. (Xinhua/Lu Boan)
