病毒性肝炎病原和传播途径的复杂性决定了其预防的复杂性，不同病原肝炎的预防措施也不同。1甲型和戊型肝炎均经消化道传播，预防措施类似其他肠道传染病1.1管理传染源甲型肝炎患者应常现隔离至起病后3周，接触者应接受医学观察45天。戊型肝炎的隔离期为3周，接触者应医学观察6 The complexity of viral pathogens and routes of transmission determines the complexity of prevention, and precautionary measures for different pathogenic hepatitis are different. 1 Hepatitis A and E are transmitted through the digestive tract and the preventive measures are similar to those of other intestinal infectious diseases. 1.1 Management of Hepatitis A Patients should be isolated from their origin until 3 weeks after onset and contacts should receive medical observation for 45 days. Hepatitis E isolation period of 3 weeks, contacts should be medical observation 6