The Gut HIV Reservoir and Heart Study seeks to find out if pockets of HIV hiding in the gut are causing inflammation in the body that contributes to heart disease in people living with HIV. Investigators Cecile Lahiri, MD, MSc Principal Investigator Christina Gavegnano, PhD Principal Investigator Susan Ribeiro, PhD Principal Investigator John Oshinski Co-Investigator Arshed Quyyumi Co-Investigator Rafick-Pierre Sékaly Co-Investigator Lauren Collins Co-Investigator Christina Mehta Co-Investigator, Lead Biostatistician