title: Hepatitis associated antigen and antibody in blood donors in Dar es Salaam.
mesh_terms: D000906:Antibodies / Q000032:analysis*; D001782:Blood Donors; D006509:Hepatitis B / Q000276:immunology*; D006511:Hepatitis B Antigens / Q000032:analysis*; D006801:Humans; D007122:Immunoelectrophoresis; D008403:Mass Screening; D011863:Radioimmunoassay; D013636:Tanzania
chemical_list: D000906:Antibodies; D006511:Hepatitis B Antigens