Zhejiang Provincial Center for Disease Control and Prevention - Department of Infectious Diseases, Chinese Academy of Sciences (CAS) - CAS Key Laboratory of Pathogenic Microbiology and Immunology, Shanghai Jiao Tong University (SJTU) - Shanghai Children’s Hospital, Jinan Centre for Disease Control and Prevention, Academia Sinica, Zhejiang Provincial Center for Disease Control and Prevention - Department of Infectious Diseases, Zhejiang Provincial Center for Disease Control and Prevention - Department of Infectious Diseases, Kafr El Sheikh University, Hangzhou Dianzi University, Yale School of Public Health - Department of Biostatistics, Academia Sinica - Research Center for Humanities and Social Science and Shanghai Jiao Tong University (SJTU) - School of Public Health