HIV Seropositivity

This is a dual arm (arm 1 and arm 2) multi-centric non-randomized (prospective) study. Two new multicentric cohorts will be set up in 4 Belgian HIV reference centers (UZ Gent, UZ Brussel, University Hospital Liege and St. Pierre Hospital Brussels): cohort 1 will comprise PLWH in whom ART was initiated during acute HIV infection minimum 3 years ago but no more than 10 years ago (short-term ART cohort); cohort 2 will comprise PLWH on ART since \>20 years (long-term ART cohort). Participants will be included based on suppressed viremia and uninterrupted ART since initiation. Participants will undergo one blood sampling and one leukapheresis. In and exclusion criteria are described below.

The goal of this Hybrid Type I effectiveness-implementation trial is to test an evidence-based, flexible, and tailored intervention that leverages existing social network members to promote retention in care and viral suppression among people living with HIV aged 18-49.

The primary objective of the study is to determine the frequency of transmission of viruses carrying at least one antiretroviral resistance mutation in all participants newly diagnosed with HIV-1