病毒性肝炎是全球性传染病,对儿童的威胁是极大的。甲、乙、丙型肝炎病毒是学龄儿童感染的主要亲肝病毒,学龄儿童时期感染病毒后,多数表现为不显著性感染,到成年期后常演变为慢性肝炎。由于对病毒性肝炎目前尚缺乏特异性抗病毒治疗方法,因此,防止学龄儿童病毒性肝炎的发生是非常重要的。1 甲型肝炎 Viral hepatitis is a global epidemic that poses a great threat to children. Hepatitis A, B and C are the major antiviral viruses in school-age children. After the virus was infected in school-age children, most of them showed no significant infection and often became chronic hepatitis after adulthood. Because of the lack of specific antiviral treatment for viral hepatitis, it is very important to prevent the occurrence of viral hepatitis in school-aged children. Hepatitis A