Sexual health and access to services are a pressing need for young people. This article introduces Link Up, a
3-year project in three African and two Asian countries, to enable and scale up access to integrated HIV
services and sexual and reproductive health and rights for marginalized young people. The young people we
worked with in this project included young men who have sex with men, young sex workers, young people
who use drugs, young transgender people, young homeless people, and other vulnerable young people. The
research and programmatic activities of Link Up, as illustrated in this Supplement, have highlighted the
importance of recognizing and engaging with diversity among young people to improve access to services
and outcomes protecting their health and human rights