Sun Yat-sen University (SYSU) - School of Public Health, Sun Yat-sen University (SYSU) - School of Life Sciences, Boston University - Department of Health Law, Policy and Management, Columbia University - Center for Infection and Immunity, Sun Yat-sen University (SYSU) - Animal Experiment Center, Sun Yat-sen University (SYSU) - School of Public Health, Shenyang Agricultural University - Key Laboratory of Livestock Infectious Diseases in Northeast China, Shenyang Agricultural University - Key Laboratory of Livestock Infectious Diseases in Northeast China, Shenyang Agricultural University - Key Laboratory of Livestock Infectious Diseases in Northeast China, Sun Yat-sen University (SYSU) - School of Public Health and Sun Yat-sen University (SYSU) - School of Public Health