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隔离人群的研究一直是认识病原体自然史和传播方式的一个重要的途径。业已初步证明,乙型肝炎病毒能在很小的隔离人群中存活下来,甲肝病毒与此相反,它感染所有的易感者之后不可能在这样的环境中维持。法罗群岛由17个小岛组成,位于大西洋北部温带,1973年人口为42,000人,平均每平方公里约30人,居民大多为斯堪的那维亚人后裔,主要以捕鱼和鱼类加工为业,住房条件和卫生标准高,医药条件良好。1928～1977年间,岛上有两次大的肝炎流行:一次在1928～1930年,另一次在1955～1958年,这两次流行之间只有少数病例。大的流行年份,病例以儿童占大多数,而散发年份病例以成人为主。1966～1975年病例
Isolation studies have long been an important way to understand the natural history of pathogens and how they are transmitted. It has been tentatively shown that hepatitis B virus can survive in very small isolated populations and that, in contrast, it can not be maintained in such an environment after it infects all susceptible individuals. The Faroe Islands, made up of 17 small islands and located in the temperate North Atlantic, had a population of 42,000 in 1973 and an average of about 30 inhabitants per sq. Km. The inhabitants are mostly Scandinavian descendants, mainly fishing and fish processing For the industry, housing conditions and high standards of health, good medical conditions. Between 1928 and 1977, there were two major hepatitis epidemics on the island: one in 1928-1930 and the other in 1955-1958. There were only a few cases of these two endemic epidemics. Large popular years, the majority of cases of children, and the year of dissemination of cases of adults. 1966 ~ 1975 cases