Shenzhen Center for Disease Control and Prevention, Sun Yat-sen University (SYSU), Sun Yat-sen University (SYSU), Sun Yat-sen University (SYSU), Fudan University, Sun Yat-sen University (SYSU), Sun Yat-sen University (SYSU), Sun Yat-sen University (SYSU), Sun Yat-sen University (SYSU), Sun Yat-sen University (SYSU), Sun Yat-sen University (SYSU), Sun Yat-sen University (SYSU), Sun Yat-sen University (SYSU), Nanjing University of Information Science and Technology, affiliation not provided to SSRN, Sun Yat-sen University (SYSU), Sun Yat-sen University (SYSU), Sun Yat-sen University (SYSU), Sun Yat-sen University (SYSU), Shenzhen Center for Disease Control and Prevention, Shenzhen Center for Disease Control and Prevention, Shenzhen Center for Disease Control and Prevention, Shenzhen Center for Disease Control and Prevention, Shenzhen Center for Disease Control and Prevention, Shenzhen Center for Disease Control and Prevention, School of Medicine, Sun Yat-Sen University, Shenzhen Center for Disease Control and Prevention, Shenzhen Center for Disease Control and Prevention, Shenzhen Center for Disease Control and Prevention, Sun Yat-sen University (SYSU) - School of Medicine, Sun Yat-sen University (SYSU) - School of Public Health and Sun Yat-sen University (SYSU)