IL2 and tuberculosis: When the entire TB pathology was compared between groups using established quantitative scoring criteria [7,22,32], the comparison confirmed that the ZOL/IL-2-treated (Group-2) and IL-2-treated (Group-3) macaques had significantly milder TB lesions or pathology than the TB drugs alone and saline control groups (Figure 7(C); p < 0.05, respectively).