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从近来的流行病学、临床和动物实验中清楚地见到,甲型肝炎病毒(NAV)感染人们后,不仅发生甲型肝炎,且更多地表现为无症状的亚临床型肝炎和隐性感染。HAV感染存在于世界上已有2200多年历
It is clear from recent epidemiological, clinical and animal experiments that hepatitis A virus (NAV) infects not only Hepatitis A but also asymptomatic subclinical hepatitis and recessiveness infection. HAV infection exists in the world has more than 2,200 years of history