1. Guangdong Workstation for Emerging Infectious Disease Control and Prevention, Guangdong Provincial Key Laboratory of Pathogen Detection for Emerging Infectious Disease Response, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China
2. Department of Public Health and Preventive Medicine, School of Medicine, Jinan University, Guangzhou, China
3. School of Public Health, Southern Medical University, Guangzhou, China
4. School of Public Health, Sun Yat-Sen University, Guangzhou, China
5. School of Public Health, Guangdong Pharmaceutical University, Guangzhou, China
6. Guangzhou Chest Hospital, Guangzhou Medical University, Guangzhou, China
7. Quality Control Department, Sinovac Life Sciences Co. Ltd., Beijing, China