1. Infectious Disease Prevention and Control, Chongqing Municipal Center for Disease Control and Prevention, Chongqing, China
2. School of Public Health, Southwest Medical University, Luzhou, Sichuan, China
3. Chongqing Municipal Key Laboratory for High Pathogenic Microbes, Chongqing, China
4. Microbiological examination, Chongqing Municipal Center for Disease Control and Prevention, Chongqing, China
5. Department of Biostatistics and Systems Biology, School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen, Guangdong, China
6. School of Public Health, Chongqing Medical University, Chongqing, China