Analysis on the Surveillance of Adverse Events Following Immunization in China,2007-2008 / 中国疫苗和免疫

ABSTRACT

Objective The study is to analyze the occurrence features of Adverse Event Following Immunization (AEFI) in China,and to evaluate the implementation of AEFI surveillance system,the safety of National Immunization Program (NIP) Vaccines and the quality of the immunization services.Methods The AEFI data of 2007-2008 were collected through the China Information System and the Children Immunization Information System,which reported before march 25,2009.The descriptive methodology was used in the study.Results 32120 AEFI cases of 2007-2008 were reported,95.02% were reported from 10 pilot provinces.The ratio of male and female was 1.41:1.77.53% cases were ≤1 years old and the cases were occurred more often between april to october.The first three vaccines are DPT,MPV and JREV.65.85% happened after the 1st and 2nd dose and 75.05% within ld after vaccination.The estimat reported incidence of NIP vaccines were 7.99～322.77 per million doses.In the classification of AEFI cases,79.93% cases were common,minor reactions,14.65% were rare,serious reactions and others were