乙肝病毒(HBV)感染有急性和慢性感染两种情况。急性者较少,大多数为慢性持续感染。根据美国 NIH 的报告,急性乙肝出现症状的不到半数,其中多为黄疸型,其余为短期病毒抗原血症,随后阴转出现抗-HBc 而痊愈.由急性乙肝转为慢性的,国外报告一般在5%以下,台湾报告为2.6%。慢性 Hepatitis B virus (HBV) infection in both acute and chronic infections. Acute fewer, the majority of chronic persistent infection. According to the report of the United States NIH, less than half of the symptoms of acute hepatitis B, mostly jaundice, and the rest for the short-term virus antigenemia, followed by anti-anti-HBc turned Yin and recovery from acute hepatitis B to chronic, foreign reports generally Below 5%, Taiwan reported 2.6%. Chronic