Guangxi Zhuang Autonomous Region Center for Disease Prevention and Control, Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC) - Department of Infectious Diseases, Guangxi Zhuang Autonomous Region Center for Disease Prevention and Control, Guangxi Zhuang Autonomous Region Center for Disease Prevention and Control, Guangxi Zhuang Autonomous Region Center for Disease Prevention and Control, Guangxi Zhuang Autonomous Region Center for Disease Prevention and Control, Guangxi Zhuang Autonomous Region Center for Disease Prevention and Control, Guangxi Zhuang Autonomous Region Center for Disease Prevention and Control, Guangxi Medical University - School of Public Health, Guangxi Zhuang Autonomous Region Center for Disease Prevention and Control, Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC) - Department of Infectious Diseases, Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC) - Department of Infectious Diseases, Chinese Center for Disease Control and Prevention (China CDC) and Guangxi Zhuang Autonomous Region Center for Disease Prevention and Control