1. Hubei Provincial Center for Disease Control and Prevention, Wuhan, China
2. Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, China
3. School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
4. Xiangyang Health Commission, Xiangyang, China
5. Xiangyang Center for Disease Control and Prevention, Xiangyang, China
6. Xiangzhou County Center for Disease Control and Prevention, Xiangyang, China
7. Xiangyang Hospital of Infectious Diseases, Xiangyang, China