title: Delta agent in Britain.
mesh_terms: D006509:Hepatitis B / Q000276:immunology; D006511:Hepatitis B Antigens / Q000302:isolation & purification*; D035923:Hepatitis delta Antigens; D006801:Humans; D019966:Substance-Related Disorders / Q000276:immunology*; D006113:United Kingdom
chemical_list: D006511:Hepatitis B Antigens; D035923:Hepatitis delta Antigens