病毒性肝炎最少由两种明确的病原体所致。同种血清性肝炎与传染性肝炎的病毒,可借全血、血浆、凝血酶与纖维蛋白元来传播,而不能借血清白蛋白、丙种球蛋白或溶纖维素传播。加热消毒是最有效的杀灭微生物的方法。在22℃下,保存血浆6个月,也可消除病毒。传染性肝炎主要是通过患者的大便来传布。身体接触,污染的水、牛奶和食物也可传布疾病。呼吸道不重要。故污染的大便必须处理或高压消毒。病后可有免疫力,但仅持续6～12月。对传染性肝炎注射丙种球蛋白2毫升,对同种血清性肝炎注射10毫升,都可明显减低其感受性。自动免疫系属可能,但迄今 Viral hepatitis is caused by at least two specific pathogens. The same kind of hepatitis and infectious hepatitis virus, can be transmitted by whole blood, plasma, thrombin and fibrin, but not by serum albumin, gamma globulin or lysosomal transmission. Heat sterilization is the most effective way to kill microorganisms. At 22 ℃, save the plasma for 6 months, but also eliminate the virus. Infectious hepatitis is mainly spread through the patient’s stool. Physical contact, contaminated water, milk and food can also spread the disease. The respiratory tract is not important. So contaminated stool must be treated or autoclaved. Disease may have immunity, but only for 6 to 12 months. Infectious hepatitis injection of gamma globulin 2 ml, 10 ml of allogeneic hepatitis injection, can significantly reduce its susceptibility. Autoimmunity is possible, but so far