However, based on their known biological roles—POTEF in retinal homeostasis [39], MUC4 in mucin production [40], and SPATA31A1 in cell differentiation and spermatogenesis [41]—it is unlikely that these genes are directly involved in the pathogenesis of cefaclor‐induced anaphylaxis. The gene discussed is MUC4; the disease is anaphylaxis.