About the Authors

Xiang Huo

Affiliation Department of Acute Infectious Disease, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, China, 210009

Ke Xu

Affiliation Department of Acute Infectious Disease, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, China, 210009

Qigang Dai

Affiliation Department of Acute Infectious Disease, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, China, 210009

Xian Qi

Affiliation Department of Acute Infectious Disease, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, China, 210009

Huiyan Yu

Affiliation Department of Acute Infectious Disease, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, China, 210009

Changjun Bao

bao2000_cn@163.com

Affiliation Department of Acute Infectious Disease, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, China, 210009

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: XH CJB KX. Performed the experiments: XH QGD XQ HYY. Analyzed the data: XH QGD. Contributed reagents/materials/analysis tools: QGD KX. Wrote the paper: XH CJB.