April 2015 — The USAID/Sustainable Management of the HIV/AIDS Response and Transition to Technical Assistance (SMART TA) program worked with local stakeholders to conduct a study on loss to follow-up (LTFU) and mortality among HIV-infected patients in Vietnam. The purpose of the study was to estimate the “true” rates of LTFU, transfers and death reported by sites after attempted contact tracing to determine the patients’ status. With this information, factors potentially associated with LTFU and mortality from HIV can be more clearly identified for future programmatic interventions to support retention in care and reduce death. These measures are critical to reaching the second target of the UNAIDS 90-90-90 goal by better understanding populations at risk for LTFU or premature death from HIV.