Zhejiang University, Zhejiang University - State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Zhejiang University, Zhejiang University - School of Public Health, Johns Hopkins University - Bloomberg School of Public Health, Zhejiang University, Zhejiang University, Zhejiang University - State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Zhejiang University - School of Public Health, Zhejiang University, Zhejiang University, Zhejiang University, Zhejiang University, Zhejiang University, Zhejiang Provincial Center for Disease Control and Prevention, Zhejiang University, Zhejiang University and Zhejiang University - State Key Laboratory for Diagnosis and Treatment of Infectious Diseases