title: Acquisition of antibody to hepatitis B antigen in three socioeconomically different medical populations.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000906:Antibodies / Q000032:analysis; D000917:Antibody Formation; D001771:Blood Banks; D001782:Blood Donors; D002648:Child; D002675:Child, Preschool; D003168:Complement Fixation Tests; D006511:Hepatitis B Antigens; D006515:Hepatitis B virus / Q000276:immunology* / Q000302:isolation & purification; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008875:Middle Aged; D009519:New York City; D011863:Radioimmunoassay; D012959:Socioeconomic Factors; D019966:Substance-Related Disorders / Q000276:immunology
chemical_list: D000906:Antibodies; D006511:Hepatitis B Antigens