Consistent with the immune infiltration results of the three datasets, resting CD4 memory T cells, CD4 naïve T cells, naïve B cells, memory B cells, plasma cells, resting NK cells, activated NK cells, monocytes, macrophages M0, macrophages M1, macrophages M2, activated mast cells, eosinophils, and neutrophils were significantly different between AD and normal samples. The gene discussed is CD4; the disease is Alzheimer disease.