老年人和青年人相比,患病毒性肝炎的机会而较少。原因是,能从幼年经历少年、青年、中年走到老年,一般都经受过无数次病原微生物的感染和攻击,每次病后恢复,都产生一定的抗体,亦即是常说的抵抗力。如甲型肝炎在老年人就较少见。但亦有例外,如近年才发现的戊型病毒性肝炎则在年纪大的人多见,而且发病率有逐年增加的趋 Older adults have fewer opportunities for viral hepatitis than young people. The reason is that from adolescence through adolescence, youth, middle-aged go to the elderly, are generally subjected to numerous infections and attacks of pathogenic microorganisms, each recovery after the disease, have a certain antibody, which is often said that the resistance . Hepatitis A is rare in the elderly. However, there are some exceptions. For example, the type-A viral hepatitis discovered in recent years is more common in older people, and the incidence increases year by year