The goal of this project is to design a high-throughput assay platform that can be used to reproducibly quantify changes in the size of the replication-competent latent HIV reservoir in resting CD4+ memory T cells isolated from individuals on highly effective antiretroviral therapy. Included are studies for validating the assay by demonstrating correlation with quantitative viral outgrowth assays (QVOA) and/or functional non-induced HIV proviruses using cells isolated from virally suppressed HIV+ individuals on optimized antiretroviral therapy.