title: The delta agent comes of age.
mesh_terms: D000328:Adult; D000818:Animals; D002648:Child; D003673:Defective Viruses; D006509:Hepatitis B / Q000150:complications / Q000382:microbiology*; D006511:Hepatitis B Antigens / Q000032:analysis*; D035923:Hepatitis delta Antigens; D006524:Hepatitis, Viral, Animal / Q000382:microbiology; D006801:Humans; D002679:Pan troglodytes
chemical_list: D006511:Hepatitis B Antigens; D035923:Hepatitis delta Antigens