一、预防HBV母婴传播失败的原因藤澤卓1.接种乙肝疫苗后仍然未能防止母婴传播病例的分类与原因分析(1)HBs抗原早期阳转组(出生后4周内阳转小儿):①宫内感染HBe抗原阳性孕妇可能造成5%～10%产儿宫内感染;②HBIG剂量不足对遭受产道感染的新生儿于出生时肌注HBIG200u(1ml)可形成 First, the prevention of mother-to-child transmission of HBV failure reasons Fujisawa Zhuo  1. After inoculation of hepatitis B vaccine still failed to prevent the mother-to-child transmission of the classification and analysis of causes (1) HBs antigen early positive group (4 weeks after birth, ): ① intrauterine infection with HBe-positive pregnant women may cause intrauterine infection in 5% to 10% of births; ② insufficient HBIG dose neonatal infants born with birth-induced intramuscular injection of HBIG200u (1ml) at birth may form