IFN-γ release from antigen stimulated whole blood culture in 48 patients with microbiologically or microscopy confirmed pulmonary TB (34 from Egypt and 14 from Greenland), 18 Mtb infected controls (Greenland), and 56 controls with negative IGRA (Egypt) were compared in terms of magnitude of IFN-γ release, and responder frequency (Fig. 1 and Table 2). The gene discussed is IFNG; the disease is pulmonary tuberculosis.