Ms Xie, the 600th cured patient of COVID-19 at the east branch of Renmin Hospital of Wuhan University, expresses her gratitude to renowned Chinese epidemiologist Li Lanjuan at the hospital in Wuhan, central China's Hubei Province, March 16, 2020. The 600th patient confirmed of novel coronavirus infection has been discharged from the east branch of the hospital on Monday. (Xinhua/Cai Yang)