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为切实评价我市消灭脊髓灰质炎（简称“脊灰”）的进程，为今后计划免疫工作提供科学依据，我市于1993年11月采用二阶段分层随机抽样方法，选择一农村地区对接种过脊灰活疫苗（TOPV）的儿童进行了血清流行病学现况监测。监测对象为1989年10月1日至1993年9月30日出生的儿童，静
In order to effectively evaluate the process of polio eradication in our city (hereinafter referred to as “polio”) and provide a scientific basis for planning immunization work in future, the city adopted a two-stage stratified random sampling method in November 1993 to select a rural area for inoculation Seroprevalence status was monitored in children who had poliovirus vaccine (TOPV). The subjects monitored were children born from October 1, 1989 to September 30, 1993