Active Surveillance of Adverse Events Following Human Papillomavirus Vaccination: Feasibility Pilot Study Based on the Regional Health Care Information Platform in the City of Ningbo, China

Zhike Liu   ^{1 *} , MD ;   Liang Zhang   ^{2 *} , BSc ;   Yu Yang   ³ , MD ;   Ruogu Meng   ³ , MD ;   Ting Fang   ² , MM ;   Ying Dong   ² , MM ;   Ning Li   ² , MM ;   Guozhang Xu   ² , MM ;   Siyan Zhan   ¹ , MD

¹ Department of Epidemiology and Biostatistics, Peking University Health Science Center, Beijing, China

² Ningbo Municipal Center for Disease Control and Prevention, Ningbo, China

³ National Institute of Health Data Science, Peking University, Beijing, China

*these authors contributed equally