About the Authors

Hanqing He

Contributed equally to this work with: Hanqing He, Pingping Yao

Affiliation Department of Immunization Program, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, Zhejiang, China

Pingping Yao

Contributed equally to this work with: Hanqing He, Pingping Yao

Affiliation Department of Microbiology Lab, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, Zhejiang, China

Yang Zhou

Affiliation Department of Immunization Program, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, Zhejiang, China

Xuan Deng

Affiliation Department of Immunization Program, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, Zhejiang, China

Jinren Pan

jrpan@cdc.zj.cn

Affiliation Department of Immunization Program, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, Zhejiang, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JP HH. Performed the experiments: PY YZ XD. Analyzed the data: HH. Contributed reagents/materials/analysis tools: PY. Wrote the paper: HH.