National immunization Days (NIDs) using bivalent OPV have been conducted in May, with further supplementary immunization activities (SIAs) planned for June.
今年5月已经利用双价口服脊灰疫苗开展了全国计划免疫日活动(NIDs)，今年6月计划进一步开展补充免疫活动(SIAs)。
National immunization Days (NIDs) using bivalent OPV have been conducted in May, with further supplementary immunization activities (SIAs) planned for June.
今年5月已经利用双价口服脊灰疫苗开展了全国计划免疫日活动(NIDs)，今年6月计划进一步开展补充免疫活动(SIAs)。
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