RecruitingClinical trialHIV Outpatient Monitoring Evaluation Through Self-collection of Dried Blood SpotsThe goal of this observational study is to establish an operational framework for home self-collections of blood samples to be used for antiviral drug concentration measurements. Participants will continue on their prescribed antiviral(s) for HIV treatment or prevention and followed for up to approximately 1 year. The investigators will compare drug concentrations of antivirals and relevant metabolites/anabolites in clinic-collected and self-collected blood samples.