1. State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Chinese Center for Disease Control and Prevention, Changping, Beijing 102206, PR China
2. Department of Pediatrics & Institute of Translational Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, PR China
3. Institute for Immunization and Prevention, Beijing Center for Diseases Prevention and Control, Beijing, PR China
4. Shanghai Institute for Emerging and Remerging Infectious Diseases, Shanghai Public Health Clinical Center, Jinshan, Shanghai, PR China