RecruitingPhase 2Drug trialImaging Immune Activation in HIV by PET-MRThis is a single center exploratory imaging study involving one intravenous microdose of \[18F\]F-AraG followed by whole-body positron emission tomography-magnetic resonance (PET-MR) imaging in HIV infected individuals to determine the anatomical distribution of the PET tracer. Participants will be enrolled if they were treated during early or late HIV infection. In addition, individuals not on antiretroviral therapy (ART) or with HIV-1 plasma RNA levels \>5,000 copies/mL will be enrolled. Up to 30 participants will be enrolled with HIV.