Immunization coverage of influenza vaccine and evaluation of its protective efficacy among primary school students in Fengtai District of Beijing, 2017-2018
FENG Bao-yu, YANG Jun-yong, LIU Lu, YANG Yang, ZHANG Jian-jun, YANG Xiao-xing
Fengtai District Center for Disease Control and Prevention, Beijing 100070, China
Abstract:Objective To investigate the coverage of influenza vaccination among pupils in Fengtai District of Beijing from 2017 to 2018, and to evaluate the protective effects of influenza vaccination in the clustering outbreaks of influenza. Methods We collected the data about the coverage of free influenza vaccination in primary school in Fengtai District of Beijing in 2017 and the surveyed data regarding influenza outbreaks occurring in influenza season in 2017-2018, and then analyzed the immunization coverage rate and protective efficacy of influenza vaccine. Results A total of 35,721 pupils from 107 primary schools and their branches with altogether 71,103 registered students in Fengtai District of Beijing in 2017 were vaccinated with free influenza vaccine. The immunization coverage rate of influenza vaccine was 50.24%. A total of 408 cases from 39 laboratory-confirmed clustering outbreaks induced by influenza virus in influenza season in 2017-2018 were reported by 23 primary schools in the district. The immunization coverage rate of influenza vaccine was found to be lower in schools with more and large-scale clustering outbreaks and secondary cases occurring after the outbreak. The incidence rate of influenza occurring during the clustering outbreaks was 22.70% in the pupils vaccinated, and 30.30% in the ones non-vaccinated. The protection rate and effectiveness index of influenza vaccine were 25.11% and 1.34, respectively. Conclusions Influenza vaccination can reduce the occurrence and spread of influenza-virus-induced clustering outbreak, and has a certain protective effect during the clustering outbreak. Health promotion and public communication should be strengthened to further increase the immunization coverage rate of influenza vaccine.
冯宝玉, 杨军勇, 刘璐, 杨洋, 张建军, 杨霄星. 2017—2018年北京市丰台区小学生流感疫苗接种及保护效果评价[J]. 实用预防医学, 2020, 27(12): 1460-1463.
FENG Bao-yu, YANG Jun-yong, LIU Lu, YANG Yang, ZHANG Jian-jun, YANG Xiao-xing. Immunization coverage of influenza vaccine and evaluation of its protective efficacy among primary school students in Fengtai District of Beijing, 2017-2018. , 2020, 27(12): 1460-1463.