IFNG and tuberculosis: The analysis of the CFP-10-induced IL-2- IFN-γ+ cytokine response in the FluoroSpot system did allow discrimination of past tuberculosis in comparison with active disease (median 3 SFC/ 200.000 PBMC versus 15.5 SFC/ 200.000 PBMC, p = 0.0068) or healthy EliSpot-IGRA-negative controls (median 3 SFC/ 200.000 PBMC versus 0 SFC/ 200.000 PBMC, p = 0.0125, Fig. 3D).