结果表明：实施计划免疫前的免疫活动对降低脊灰的发病率效果不理想；

结果表明：实施计划免疫前的免疫活动对降低脊灰的发病率效果不理想；的英文翻译

基本释义

• It revealed that the immune activities before the implementation of EPI were not satisfactory for reducing incidence of poliomyelitis.