流行病学调查研究表明,乙型肝炎病毒(HBV)从无症状携带乙型肝炎表面抗原(HBsAg)的母亲传播到其婴儿是造成大量HBsAg携带者的重要因素,约40%HBsAg慢性携带者是由母婴传播所致。各地人群的母婴传播率可有较大差异。Beasley在台湾对105例HBsAg阳性母亲的婴儿进行了平均17.5个月的随访,发现40例(38.1%)有HBV感染的证据,尤以乙型肝炎e抗原(HBeAg)阳性母亲的母婴传播率最高,已超过90%。国内患乙型肝炎或携带HBsAg母亲的婴儿1年 Epidemiological studies have shown that the transmission of hepatitis B virus from mothers with asymptomatic hepatitis B surface antigen (HBsAg) to their infants is an important factor in causing large numbers of HBsAg carriers and about 40% of chronic carriers of HBsAg are Due to mother-to-child transmission. The rate of mother-to-child transmission can vary widely across the population. Beasley conducted a mean follow-up of 17.5 months in 105 infants of HBsAg-positive mothers in Taiwan and found evidence of HBV infection in 40 cases (38.1%), especially mother-to-child transmission of hepatitis B e antigen (HBeAg) -positive mothers The highest, more than 90%. Hepatitis B or infants with HBsAg mothers in the country for 1 year