title: Decline in hepatitis attack rate over two decades and effectiveness of immunoglobulin prophylaxis. A retrospective survey in expatriates working in Nepal.
mesh_terms: D006506:Hepatitis A / Q000453:epidemiology / Q000517:prevention & control*; D006801:Humans; D007116:Immunization, Passive; D009390:Nepal; D012189:Retrospective Studies; D012306:Risk