title: The prevalence of antibody to hepatitis A antigen in various parts of the world: a pilot study.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000914:Antibodies, Viral; D000956:Antigens, Viral; D005260:Female; D006506:Hepatitis A / Q000453:epidemiology; D006507:Hepatovirus / Q000276:immunology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010865:Pilot Projects; D012675:Senegal; D014481:United States
chemical_list: D000914:Antibodies, Viral; D000956:Antigens, Viral