title: Occurrence of hepatitis B surface antigen and its antibody in Ethiopian blood-donors.
mesh_terms: D001782:Blood Donors; D004797:Enzyme-Linked Immunosorbent Assay; D005002:Ethiopia; D005260:Female; D006509:Hepatitis B / Q000517:prevention & control; D006510:Hepatitis B Antibodies / Q000032:analysis; D006514:Hepatitis B Surface Antigens / Q000032:analysis*; D006801:Humans; D008297:Male; D008403:Mass Screening
chemical_list: D006510:Hepatitis B Antibodies; D006514:Hepatitis B Surface Antigens