Recovered coronavirus patients say goodbye to medical staff before leaving the Tangshan campus of the Second Hospital of Nanjing in Nanjing, east China's Jiangsu Province, Feb. 20, 2020. Nine patients, including a baby less than one year old, were discharged from the Tangshan campus of the Second Hospital of Nanjing on Thursday after they recovered from novel coronavirus infections. (Xinhua/Ji Chunpeng)