直到1967年,一直认为乙型肝炎仅由胃肠外的途径传播。1967年 krugman 等氏证明,口服 MS—2血清引起一例亚临床型肝炎,其后,许多流行病学研究证明,许多乙型肝炎患者从未接受过注射治疗,由此便推断乙型肌炎传播的主要方式是粪一口途径。但是,这个判断对于下面的事实是缺乏说服力的。 Until 1967, hepatitis B was thought to have been transmitted only by parenteral routes. In 1967, Krugman et al. Demonstrated that oral administration of MS-2 serum caused a subclinical hepatitis. Since then, many epidemiological studies have shown that many patients with hepatitis B have never received injection therapy, and thus inferred the spread of beta-myositis The main way is the fecal route. However, this judgment is not convincing to the following facts.