title: Hazardous donors.
mesh_terms: D001782:Blood Donors; D006509:Hepatitis B / Q000517:prevention & control; D006514:Hepatitis B Surface Antigens / Q000032:analysis; D006801:Humans; D012042:Registries; D012306:Risk; D014481:United States
chemical_list: D006514:Hepatitis B Surface Antigens