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常规口服脊髓灰质炎活疫苗(OPV)免疫方案规定婴儿在≥6～8周龄时接受首次免疫,共3次.新的免疫策略则在每年的年底年初给2岁以下儿童免疫3次.为此,作者进行研究以寻求OPV免疫的年龄低限.
The routine oral OPV immunization program provides for infants who receive their first immunization at ≥6 to 8 weeks of age for a total of three immunizations and the new immunization strategy immunizes children under 2 years of age three times early each year In this regard, the authors studied to find the lower age limit for OPV immunization.