CD8A and tuberculosis: Of 38 individuals analyzed in our ICS phenotyping assay (n = 18 LTBI and n = 20 TB disesase), 6 persons with LTBI (33%) and 13 patients with TB disease (65%) had positive CFP-10 or ESAT-6-specific CD8 T cell responses that were subjected to further phenotypic analyses (Figure 1A, B).