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尽管在西非某些地区儿童接种麻疹疫苗的数量很大 ,但是麻疹仍随着已接种疫苗的年龄较长儿童的增长率的严重下降而传播 ,作者观察了已接种疫苗儿童在暴露于自然麻疹时免疫力方面的效应。对象和方法 该研究是 1992年在塞内加尔的一个农村地区麻疹流行期间进行的。该地区有 2 70
Although the number of children immunized against measles in some parts of West Africa is high, measles still spread as the rate of growth of older vaccinated children increases. The authors observed that vaccinated children exposed to natural measles Immune effects. Subjects and methods The study was conducted during a measles epidemic in a rural area of Senegal in 1992. There are 2 70 in the area