Although AD is primarily a disease of Th2 dysregulation, with IL‐4, IL‐13, IL‐31 and TSLP being key players, cytokines such as interferon (IFN)‐γ (Th1), IL‐17, IL‐22 (Th17) and IL‐33 are also involved.21 The gene discussed is IL31; the disease is Alzheimer disease.