1. Joint Research Center for Emerging and Sudden-Onset Infectious Diseases, National Institute of Pathogen Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 102629, China.
2. Public Health Emergency Management Innovation Center, State Key Laboratory of Respiratory Health and Multimorbidity, Key Laboratory of Pathogen Infection Prevention and Control (Peking Union Medical College), Ministry of Education, School of Population Medicine and Public Health, Chinese Academy of Medical Science & Peking Union Medical College, Beijing 100005, China.
3. Infectious Disease Control and Prevention, Chongqing Municipal Center for Disease Control and Prevention, Chongqing 400700, China.
4. Department of Infectious Disease Prevention and Control, Wanzhou District Center for Disease Control and Prevention, Chongqing 404199, China.