The USAID LINKAGES project focuses on achieving the UNAIDS 90-90-90 cascade approach to identify the most-at-risk key and vulnerable populations in Djibouti Ville and 12 areas. A unique identifier code and a longitudinal support and tracking system are used to reach the key populations. By 2020, the LINKAGES project aims to: 1) enroll in care 90% of those tested positive; 2) 90% of them initiated on antiretroviral treatment (ART); and 3) 90% of them tested with low viral loads.