title: Hepatitis A antibodies in two socioeconomically distinct populations of São Paulo, Brazil.
mesh_terms: D000293:Adolescent; D000328:Adult; D001782:Blood Donors; D001938:Brazil; D002648:Child; D002675:Child, Preschool; D005260:Female; D006506:Hepatitis A / Q000276:immunology*; D006508:Hepatitis Antibodies / Q000032:analysis*; D006507:Hepatovirus / Q000276:immunology*; D006801:Humans; D012698:Serologic Tests; D012959:Socioeconomic Factors
chemical_list: D006508:Hepatitis Antibodies