IFNG and infection: For the read-out of antigen stimulated-blood it has been shown in numerous studies that cytokines other than IFN-γ play an important role during the course of infection and may therefore have added diagnostic value (Kassa et al., 2012; Chegou et al., 2012; Belay et al., 2015; Coppola et al., 2016; Tebruegge et al., 2019).