Compliance among the 220 antiretroviral drugs-experienced children living in Bangui according to their virological response to treatment at inclusion [(responders (e.g., viral load below the threshold of detection; V+) and nonresponders (detectable viral load; V–), the diagnosis of virological failure (e.g., viral load below the threshold of virological failure, 1000 copies/mL, FV–; viral load ≥ 1000 copies/mL, FV+), the antiretroviral treatment line regimens (1st- or 2nd- lines) and the sex.