A medical worker patrols at the rehabilitation center based in the Wuhan Vocational College of Software and Engineering in Wuhan, central China's Hubei Province, March 10, 2020. Cured coronavirus patients who had been discharged from hospital were required to go on a 14-day quarantine at designated places for medical observation. The rehabilitation center, converted from the dormitory of the Wuhan Vocational College of Software and Engineering, has received more than 600 cured coronavirus patients who were discharged from hospital by Monday. (Xinhua/Cheng Min)

Medical workers inquire a cured coronavirus patient about his health condition at the rehabilitation center based in the Wuhan Vocational College of Software and Engineering in Wuhan, central China's Hubei Province, March 10, 2020. Cured coronavirus patients who had been discharged from hospital were required to go on a 14-day quarantine at designated places for medical observation. The rehabilitation center, converted from the dormitory of the Wuhan Vocational College of Software and Engineering, has received more than 600 cured coronavirus patients who were discharged from hospital by Monday. (Xinhua/Cheng Min)

A volunteer conducts disinfection at an empty room of the rehabilitation center based in the Wuhan Vocational College of Software and Engineering in Wuhan, central China's Hubei Province, March 10, 2020. Cured coronavirus patients who had been discharged from hospital were required to go on a 14-day quarantine at designated places for medical observation. The rehabilitation center, converted from the dormitory of the Wuhan Vocational College of Software and Engineering, has received more than 600 cured coronavirus patients who were discharged from hospital by Monday. (Xinhua/Cheng Min)

Cured coronavirus patients line up to take the nucleic acid test at the rehabilitation center based in the Wuhan Vocational College of Software and Engineering in Wuhan, central China's Hubei Province, March 10, 2020. Cured coronavirus patients who had been discharged from hospital were required to go on a 14-day quarantine at designated places for medical observation. The rehabilitation center, converted from the dormitory of the Wuhan Vocational College of Software and Engineering, has received more than 600 cured coronavirus patients who were discharged from hospital by Monday. (Xinhua/Cheng Min)

Cured coronavirus patients are seen at the rehabilitation center based in the Wuhan Vocational College of Software and Engineering in Wuhan, central China's Hubei Province, March 10, 2020. Cured coronavirus patients who had been discharged from hospital were required to go on a 14-day quarantine at designated places for medical observation. The rehabilitation center, converted from the dormitory of the Wuhan Vocational College of Software and Engineering, has received more than 600 cured coronavirus patients who were discharged from hospital by Monday. (Xinhua/Xiong Qi)

A cured coronavirus patient receives blood oxygen checking at the rehabilitation center based in the Wuhan Vocational College of Software and Engineering in Wuhan, central China's Hubei Province, March 10, 2020. Cured coronavirus patients who had been discharged from hospital were required to go on a 14-day quarantine at designated places for medical observation. The rehabilitation center, converted from the dormitory of the Wuhan Vocational College of Software and Engineering, has received more than 600 cured coronavirus patients who were discharged from hospital by Monday. (Xinhua/Xiong Qi)

A cured coronavirus patient exercises hand-waving dance at the rehabilitation center based in the Wuhan Vocational College of Software and Engineering in Wuhan, central China's Hubei Province, March 10, 2020. Cured coronavirus patients who had been discharged from hospital were required to go on a 14-day quarantine at designated places for medical observation. The rehabilitation center, converted from the dormitory of the Wuhan Vocational College of Software and Engineering, has received more than 600 cured coronavirus patients who were discharged from hospital by Monday. (Xinhua/Cheng Min)

Photo taken on March 10, 2020 shows the rehabilitation center based in the Wuhan Vocational College of Software and Engineering in Wuhan, central China's Hubei Province. Cured coronavirus patients who had been discharged from hospital were required to go on a 14-day quarantine at designated places for medical observation. The rehabilitation center, converted from the dormitory of the Wuhan Vocational College of Software and Engineering, has received more than 600 cured coronavirus patients who were discharged from hospital by Monday. (Xinhua/Cheng Min)