Peking University, School of Public Health, Department of Laboratorial Science and Technology, Peking University, School of Public Health, Department of Laboratorial Science and Technology, Peking University, School of Public Health, Department of Laboratorial Science and Technology, Peking University, School of Public Health, Department of Laboratorial Science and Technology, Beijing Institute of Microbiology and Epidemiology - State Key Laboratory of Pathogen and Biosecurity, Peking University, School of Public Health, Department of Laboratorial Science and Technology, Chongqing Medical University - Department of Respiratory Medicine, Academy of Military Sciences - Beijing Institute of Microbiology and Epidemiology and Chongqing Medical University - Department of Respiratory Medicine