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在南宁市检测了３１９对母亲及１～８月龄婴儿的麻疹血凝抑制（ＨＩ）抗体的阳性率及几何平均滴度（ＧＭＴ），发现婴儿母传抗体水平及其消退情况，与其母亲抗体水平有密切关系。一般而言，１月龄婴儿ＨＩ抗体阳性率比其母亲低２０％，ＧＭＴ相当于母亲的１／２．５，母亲ＨＩ抗体≤１∶２组，１月龄婴儿ＨＩ抗体全为阴性；母亲ＨＩ抗体１∶４组，１月龄婴儿ＨＩ抗体阳性率为４３％，４月龄全部阴性；母亲ＨＩ抗体１∶８组，１月龄婴儿ＨＩ抗体阳性率７８％，４月龄２３％，８月龄８％；母亲ＨＩ抗体１∶１６组，１月龄婴儿ＨＩ抗体阳性率８８％～１００％，６月龄３３％，８月龄１３％；母亲ＨＩ抗体≥１∶３２组，１～５月龄婴儿ＨＩ抗体阳性率１００％，８月龄８０％。这与母传麻疹抗体（主要为ＩｇＧ）在婴儿体内的半衰期有关。如将麻疹疫苗（ＭＶ）初种起始年龄提前至５月龄，１５～２３月龄再复种１剂ＭＶ，可望进一步降低婴幼儿麻疹发病率
The positive rate and geometric mean titer (HI) of measles HI in 319 maternal and infants from 1 to 8 months old were detected in Nanning City. The level of maternal antibody and its subsidence were found in maternal antibody Level is closely related. In general, the positive rate of HI antibody in 1-month-old infants was 20% lower than that of their mothers, the GMT was equal to 1 / 2.5 of the mothers, the HI of the mother was less than 1: 2, and the HI antibodies of all the 1-month-old infants were all negative. The positive rate of HI antibody in 1: 4 group and 1 month old HI antibody was 43%, which was all negative at 4 months. HI antibody positive rate was 78%, 4 months old and 23% 8 months old, 8 months old; the positive rate of HI antibody in mother 1:16 group and 1 month old infant was 88% -100%, 6 months old 33%, 8 months old 13%; mother HI≥1:32, 1 The positive rate of HI antibody of ~ 5 months old babies is 100% and 80% at 8 months old. This is related to the half-life of the mother measles antibody (mainly IgG) in infants. Such as measles vaccine (MV) early start of the initial age to 5 months old, 15 to 23 months and then a second dose of MV, is expected to further reduce the incidence of measles in infants and young children