This review synthesizes how IFN-γ overdose transacts the JAK/STAT1-IRF1-transmitter to encourage maturation of phagolysosomes, reactive oxygen and nitrogen product generation, LC3-associated phagocytosis (LAP), autophagy, and improved antigen presentation and juxtaposes these pathways in tuberculosis and leprosy. The gene discussed is IFNG; the disease is leprosy.