IL4 and Alzheimer disease: In the same way, the strongest reduction in Interleukin-4 (IL-4) secreting Th2 or Tc2 cells was observed in AD patients (Th1 median 2.4% (range 1.6 – 3.9%), p = 0.0157; Tc1 median 2.5% (range 1.2 – 5.9%), p = 0.0075) compared to controls (median 4.4% (range 3.0 – 6.2%); Tc1 median 6.8% (range 3.9 – 10.8%)).