4. Surveillance Follow-up. Data from this study will be linked at the individual level to the AHRI/Africa Centre population surveillance, which contains data on HIV testing, linkage to care, schooling, and employment. Participants will be followed up in future rounds of AHRI's routine population surveillance. Retrospective data from the surveillance will be used to understand predictors of survival expectations. Linkage will be conducted by Africa Centre staff with access to identifying information in the population surveillance. After the conclusion of data collection and linkage, the key linking identifying data collected in this study to survey responses will be destroyed and only the de-identified ID number used in the demographic surveillance will remain. Participant contact details (not linked to data) will be retained in order to disseminate findings.