The median time of HIV infection was 11 years (IQR 6–18), nadir CD4+ (the person’s lowest CD4 count) 301 cells/mm3 (IQR 114.0–352.5), and actual CD4+ (the person’s most recent CD4 count) 522 cells/mm3 (IQR: 342–706.2). Here, CD4 is linked to HIV infectious disease.