title: Letter: Hepatitis-B antigen in vaginal secretions.
mesh_terms: D001826:Body Fluids / Q000276:immunology; D005260:Female; D006511:Hepatitis B Antigens / Q000302:isolation & purification*; D006801:Humans; D011863:Radioimmunoassay; D014621:Vagina / Q000276:immunology / Q000378:metabolism*; D014626:Vaginal Smears
chemical_list: D006511:Hepatitis B Antigens