乙肝表面抗原(HBsAg)由母亲传给婴儿及婴幼儿携带HBsAg是常见的。不同种族有不同的发生率,亚洲人产期传播较常见,而高加索人则较少见。部分母婴传播因素已弄清,其中有两个很好的指标,即母体是否有HBeAg以及HBsAg的数量。出生于HBeAg阳性母亲的婴儿在三个月内约85%成为携带者,而母亲HBeAg阴性的 Hepatitis B surface antigen (HBsAg) from mother to infant and infants carrying HBsAg is common. Different races have different rates of occurrence, Asians are more common during the marijuana period, while Caucasians are less common. Some factors of mother-to-child transmission have been clarified, and there are two good indicators of them, namely, whether the mother has HBeAg and the number of HBsAg. About 85% of infants born to HBeAg-positive mothers become carriers within three months, while mothers have HBeAg-negative