We plotted the epitope-specific IFNγ/IL-13 responsiveness of individual pertussis patients (with an epitope proliferative response of S.I. ≥2) against time elapsed since diagnosis (Figure 4C) grouped as Prn peptide responses (Figure 4C, left panel) or grouped as Ptx peptide responses (Figure 4C, right panel). This evidence concerns the gene IFNG and pertussis.