CD4 and acute myeloid leukemia: The results of the immune landscape of AML patients are summarized in Figure 7A, showing that AML patients with high MRG risk had significantly higher proportions in memory CD4+ T cell, neutrophils, macrophages, monocyte, dendritic cell, natural killer (NK) cells, myeloid-derived suppressor cell (MDSCs), regulatory T cells, and immature B cells.