1. Key Lab of Enteric Pathogenic Microbiology, Ministry of Health, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, China
2. These authors contributed equally to this work
3. Institute for Viral Diseases Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
4. Nanjing Maternity and Child Health Care Hospital, Nanjing, China
5. Suzhou Center for Disease Control and Prevention, Suzhou, China
6. Wuxi Center for Disease Control and Prevention, Wuxi, China
7. Changzhou Center for Disease Control and Prevention, Changzhou, China
8. Zhenjiang Center for Disease Control and Prevention, Zhenjiang, China