“…This association appears to be particularly strong in those areas of the world, such as the Far East and parts of Africa, where PHC occurs commonly (Prince et al, 1970;Vogel et al, 1970;Kew et al, 1974). These areas also appear to have, in the general population, both a high carrier rate of HBV (Prince, 1971;Tong et al, 1971;Hersh et al, 1971;) and a high incidence of acute virus-B hepatitis (Tong et al, 1971;Kew et al, 1974). However, in countries in which PHC is rare, e.g.…”