title: Semantics of viral hepatitis and Australia antigen.
mesh_terms: D006506:Hepatitis A / Q000209:etiology / Q000276:immunology; D006509:Hepatitis B / Q000276:immunology; D006511:Hepatitis B Antigens; D006801:Humans; D012660:Semantics
chemical_list: D006511:Hepatitis B Antigens