1. Beijing Center for Disease Prevention and Control, Beijing, People’s Republic of China
2. Beijing Research Center for Respiratory Infectious Diseases, Beijing, People’s Republic of China
3. Department of Emergency, Peking University First Hospital, Beijing, People’s Republic of China
4. Xicheng District Center for Disease Prevention and Control, Beijing, People’s Republic of China
5. Department of Respiratory and Critical Care Medicine, Peking University First Hospital, Beijing, People’s Republic of China
6. Department of infection control, Peking University First Hospital, Beijing, People’s Republic of China
7. Department of neurology, Peking University First Hospital, Beijing, People’s Republic of China
8. CAS Key Laboratory of Pathogen Microbiology and Immunology, Institute of Microbiology, Center for Influenza Research and Early-warning (CASCIRE), CAS-TWAS Center of Excellence for Emerging Infectious Diseases (CEEID), Chinese Academy of Sciences, Beijing, People’s Republic of China
9. University of Chinese Academy of Sciences, Beijing, People’s Republic of China
10. School of Public Health, Capital Medical University, Beijing, People’s Republic of China