Medical staff queues up to enter the buffer zone from the isolation ward at Wuhan No.1 Hospital in Wuhan, central China's Hubei Province, Feb. 22, 2020. Medical staff of the hospital enter the isolation wards in groups and shifts to work. Each time when they enter, they must carefully prepare for nearly half an hour, wear at least 8 pieces of equipment through 5 isolation doors, and work inside for 6 hours. Wuhan No.1 Hospital is specially equipped with supervisors to help medical staff wear equipment and check omissions. Medical workers in Wuhan have raced against time and spared no effort to fight against the epidemic. (Xinhua/Xiao Yijiu)