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对 5 8对 2 5～ 30岁产妇及其婴儿的麻疹抗体的研究表明 ,5 8对母婴中有 5 1对母婴麻疹抗体滴度相同 ,7对不同 ,但只相差 1个滴度 ,且两者抗体均处于低水平 ,说明母婴抗体间有密切关系。通过对胎传抗体追踪观察发现 ,新生儿抗体水平不高 ,3月龄时抗体阳性率已降至 48 3% ,6月龄和 8月龄时分别降至 19 0 %和 15 0 % ,6月龄和 8月龄婴儿接种麻疹疫苗后免疫成功率分别为 84 5 %和 85 0 % ,因此可考虑将麻疹疫苗初免提前到 6月龄时进行
A study of 58 pairs of measles antibodies to mothers and their infants aged 25 to 30 years showed that 5 out of 58 maternal and infant pairs had the same antibody titer of maternal and neonatal measles with 7 different but one titer difference, And the two antibodies are at a low level, indicating that there is a close relationship between maternal and child antibodies. Through the observation of fetal antibody tracking found that neonatal antibody levels are not high, at 3 months of age the antibody positive rate has dropped to 48 3%, 6 months and 8 months of age were reduced to 190% and 150%, 6 The immunization success rates of measles vaccine at months of age and 8 months old were 84 5% and 85 0%, respectively, so the initial immunization of measles vaccine could be considered as early as 6 months of age