title: Prevalence of hepatitis B virus antigen as revealed by direct radioimmune assay with  125 I-antibody.
mesh_terms: D000818:Animals; D000914:Antibodies, Viral; D001782:Blood Donors; D003168:Complement Fixation Tests; D006168:Guinea Pigs / Q000276:immunology; D006509:Hepatitis B / Q000276:immunology; D006511:Hepatitis B Antigens / Q000302:isolation & purification*; D006801:Humans; D007106:Immune Sera; D005779:Immunodiffusion; D007122:Immunoelectrophoresis; D007136:Immunoglobulins; D007158:Immunologic Techniques / Q000592:standards; D007456:Iodine Isotopes; D011863:Radioimmunoassay
chemical_list: D000914:Antibodies, Viral; D006511:Hepatitis B Antigens; D007106:Immune Sera; D007136:Immunoglobulins; D007456:Iodine Isotopes