Routine VL (viral load) monitoring started in Butha-Buthe hospital in December 2015, in Seboche Hospital in May 2016 and the remaining 10 health centres in June 2016. Once each hospital/health center has implemented routine VL monitoring for a least 12 weeks, the standardized adherence intervention will be rolled out to the hospitals/health centers in a randomized fashion. Every 12 weeks starting in May 2017, two hospitals/health centers will be randomly selected to start with the adherence intervention.