Cured patients leave the quarantine zone after finishing medical observation at the Changjiangxincheng medical observation station in Wuhan, central China's Hubei Province, April 13, 2020. The medical observation station declared its closure on Monday as its last 7 cured patients finished their 14-day quarantine for medical observation. Since it was put into use on March 3, the station has received 1,419 cured patients to undergo a further quarantine for medical observation. (Photo by Shi Wei/Xinhua)

A cured patient waves goodbye to staff members at the Changjiangxincheng medical observation station in Wuhan, central China's Hubei Province, April 13, 2020. The medical observation station declared its closure on Monday as its last 7 cured patients finished their 14-day quarantine for medical observation. Since it was put into use on March 3, the station has received 1,419 cured patients to undergo a further quarantine for medical observation. (Photo by Shi Wei/Xinhua)

Photo taken on April 13, 2020 shows the Changjiangxincheng medical observation station in Wuhan, central China's Hubei Province. The medical observation station declared its closure on Monday as its last 7 cured patients finished their 14-day quarantine for medical observation. Since it was put into use on March 3, the station has received 1,419 cured patients to undergo a further quarantine for medical observation. (Photo by Shi Wei/Xinhua)