Clinical Indicators: Patient demographic and health data, including gender, age, BMI, smoking status, ethnicity, nadir CD4 count, CD4/CD8 ratio, pre-ART zenith plasma viral load, time to treatment (the period between diagnosis of HIV infection and the start of treatment) and time of suppressive ART (duration between the initiation of the current suppressive ART regimen and the first study visit). This evidence concerns the gene CD4 and HIV infectious disease.