Figure 3: Enumeration of antigen-specific dual cytokine-secreting T cells in HHC and TB patients. Box and Whisker plots show range, interquartile range, and median of antigen-specific CD4+IFN-γ +IL-2+ T cell (a) and CD8+IFN-γ +IL-2+ T cell (b) in HHC and TB patients. The frequency of IFN-γ +IL-2+ T cell subset did not differ between HHC and TB patients. The difference between HHC and TB was calculated by Mann-Whitney test. TB: tuberculosis patients; HHCs: healthy household contacts.