Figure 7B displays the correlation heat map of 22 immune cells. Violin plots of immune cell infiltration differentials showed that T cells CD4 naïve significantly differed in CAD (Figure 7C). RBP1 was considerably positively connected with B cells naive, T cells CD4 memory activated, T cells CD4 naive, and negatively correlated with Macrophages M0, B cells memory, and T cells regulatory (Tregs), according to the correlation between RBP1 and immune cells (Figure 7D). Here, CD4 is linked to coronary artery disorder.