High incidence of delta antigen in serum.
D006509:Hepatitis B / Q000276:immunology*; D006511:Hepatitis B Antigens / Q000032:analysis*; D035923:Hepatitis delta Antigens; D006801:Humans; D007494:Ireland; D019966:Substance-Related Disorders / Q000097:blood
D006511:Hepatitis B Antigens; D035923:Hepatitis delta Antigens