IL13 and pertussis: 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).