As EGFR and corticosteroids also have beneficial effects on epithelial repair and barrier function,54 discriminating between pro‐inflammatory and pro‐repair functions for these pathways, and the role(s) of individual ligands and ERBB receptor heterodimers, should help to tailor more effective therapies for severe asthma.45 Such studies would offer the potential of exploiting the array of small molecule drugs and antibodies that have been developed for cancer therapy.71, 75. Here, EGFR is linked to asthma.