Of the 12 major immune cell types (B cells, plasma cells, CD8+ T cells, CD4+ T cells, γδ T cells, NK cells, monocytes, macrophages, dendritic cells, mast cells, eosinophils, and neutrophils), we found a statistically significant difference in the proportion of neutrophils; that is, an increase in the proportion of neutrophils was significantly associated with AD prognosis. This evidence concerns the gene CD4 and Alzheimer disease.