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Correlation between VIP-SPOT and other HIV-1 measures of viral burden in viremic samples. Spearman’s rank correlation test was used for statistical analysis (n = 18). (A) Correlation between the frequency of HIV antigen (Ag)-producing CD4+ T cells in peripheral blood and total HIV-1 DNA, as measured by droplet digital PCR (ddPCR). (B) Correlation between the frequency of HIV antigen-producing cells and intact proviruses. (C) Correlation between VIP-SPOT data and plasma viral load.
