以往血清流行病学调查已证明上海地区的婴儿乙型肝炎表面抗原(HBsAg)携带率已有很高的水平。HBsAg 阳性产妇的婴儿在出生后6个月随访时 HBsAg 阳性率已达30～50%,其中 HBeAg 阳性产妇的婴儿 HBsAg 阳 Serological epidemiological surveys in the past have shown that Shanghai has a high infant carrier of hepatitis B surface antigen (HBsAg). HBsAg positive mothers of infants at 6 months after birth at the time of HBsAg positive rate has reached 30 to 50%, of which HBeAg positive mothers of infants HBsAg positive