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Altered cytokine responses exist in both CD4 and CD8 T cell subsets of HIV+ compared with healthy controls. Values for the percentages of CD4 and CD8 cells staining positive for IL-2 (a) or IFN-γ (b) were ‘normalized’ by dividing the percentages of the IL-2- and IFN-γ-staining CD4+ and CD8+ cells by the total percentages of CD4+ and CD8+ T cells in the CD3 population. ***P< 0.0001; NS, not significant.
