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Analysis of polyfunctional T cells. Interleukin-2 (IL-2), interferon-γ (IFN-γ) and tumor necrosis factor-α (TNF-α) production were measured by intracellular cytokine staining on the single-cell level. Two representative individuals from human donors and non-human primates are shown as a paradigm. Note the increased frequency of polyfunctional T-cells in human donors compared with non-human primates.
