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Figure 5: Memory phenotype of antigen-specific CD8+IFN-γ + T cells in HHC and TB patients. Box and Whisker plots show range, inter-quartile range, and median of antigen-specific IFN-γ-secreting memory T cell subsets in HHC and TB patients. Effector memory subset secretes more IFN-γ than other memory subsets in HHC and TB patients. The difference between HHC and TB was calculated by Mann-Whitney test. EM: effector memory T cell; CM: central Memory T cell; TM: terminally differentiated memory T cell; TB: tuberculosis patients; HHCs: healthy household contacts.