China CDC Key Laboratory of Environment and Population Health;
National Institute of Environmental Health;
Chinese Center for Disease Control and Prevention;
Beijing 100021;
China;
Environmental Research Center;
Duke Kunshan University;
Kunshan 215316;
China;
Nicholas School of the Environment;
Duke University;
Durham;
NC 27708;
USA;
Center for Global Health;
School of Public Health;
Nanjing Medical University;
Nanjing 211166;
China;
Centralized isolation; Risk control; Infectious patients; Close contacts; Coronavirus disease;