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乙型肝炎病毒(HBV)是一种经血液和性传播的病毒,通过皮肤和黏膜暴露于受感染人员的血液和其他体液而感染,急性乙型肝炎的临床表现严重,严重的并发症(即肝硬化和肝癌)多在发生慢性感染者中。在美国,大约有120万人慢性感染乙肝病毒,并是将乙肝病毒传播给他人的传染源。然而,自1980年代后期以来,急性乙型肝炎的发病率逐步下降,特别是在接种儿童中。为了了解美国急性乙型肝炎的流行病学特征,CDC分析了1990-2002年全国法
Hepatitis B virus (HBV) is a blood-borne and sexually transmitted virus that is transmitted through exposure of the skin and mucous membranes to the blood and other bodily fluids of infected persons. The clinical manifestations of acute hepatitis B are severe and serious complications (ie, Cirrhosis and liver cancer) and more in those with chronic infection. In the United States, about 1.2 million people are chronically infected with hepatitis B virus and are the source of transmission of hepatitis B virus to others. However, the incidence of acute hepatitis B has been declining since the late 1980s, especially among vaccinated children. In order to understand the epidemiological characteristics of acute hepatitis B in the United States, CDC analyzed the National Law 1990-2002