1 Department of Infectious Diseases, The First Hospital of Changsha, Changsha, China.
2 Department of Infectious Diseases, The Second Xiangya Hospital, Central South University, Changsha, China.
3 Department of Respiratory Medicine, The First Hospital of Changsha, Changsha, China.
4 National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China.
5 Department of Intensive Care Unit, The First Hospital of Changsha, Changsha, China.
6 Department of Pediatrics, The First Hospital of Changsha, Changsha, China.
7 Department of Internal Medicine, The First Hospital of Changsha, Changsha, China.
8 Key Laboratory of Diabetes Immunology (Central South University), Ministry of Education, National Clinical Research Center for Metabolic Diseases, The Second Xiangya Hospital, Central South University, Changsha, China.
9 Department of Infectious Diseases, The Second Xiangya Hospital, Central South University, Changsha, 410011, China. Electronic address: jiangyongfang@csu.edu.cn.
10 Department of Infectious Diseases, The First Hospital of Changsha, Changsha, China. Electronic address: 1286779459@qq.com.
11 National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China. Electronic address: tanwj@ivdc.chinacdc.cn.
12 Department of Infectious Diseases, The Second Xiangya Hospital, Central South University, Changsha, China. Electronic address: gongguozhong@csu.edu.cn.