Health-care transition from adolescent to adult services for young people with HIV.

HIV-related care and treatment engagement are crucial steps to improve individual and population-level health; yet, many young people (18-25 years old) with HIV are not maintained in, or disengage from, care. Health-care transition and the transfer to adult care are particularly vulnerable points in the care and treatment of young people with HIV. In this Review, we explore barriers and facilitators to health-care transition, evaluate existing health-care transition programmes, and identify best practices for the improvement of health-care transition outcomes and health. Although we examine health-care transition across a range of geographical regions, most examples are from the settings in which the most research has been done-the USA and western Europe.