A health worker (L) fills out a form to report his health condition before receiving the COVID-19 vaccination at a community health center in Xuanwu District of Nanjing, east China's Jiangsu Province, Jan. 21, 2021. (Xinhua/Ji Chunpeng)
A health worker receives a dose of COVID-19 vaccine at a community health center in Xuanwu District of Nanjing, east China's Jiangsu Province, Jan. 21, 2021. (Xinhua/Ji Chunpeng)
A nurse receives a dose of COVID-19 vaccine at a community health center in Xuanwu District of Nanjing, east China's Jiangsu Province, Jan. 21, 2021. (Xinhua/Ji Chunpeng)
A nurse receives a dose of COVID-19 vaccine at a community health center in Xuanwu District of Nanjing, east China's Jiangsu Province, Jan. 21, 2021. (Xinhua/Ji Chunpeng)
