CD4 and AIDS: Characteristics of patients were as follows: median age 42.2 years (19.1–79.1), hepatitis B virus (HBV) and/or hepatitis C virus (HCV) co-infection 47 (18.8%), median CD4 610 (2–1758), CD8 793 (113–4010), presence of a past AIDS event for 88 patients (23%).