The violin plot revealed that activated memory CD4 + T cells, M0 macrophages, M1 macrophages, and gamma delta T cells infiltrated significantly more in rosacea lesional group than HC group, while Tregs, activated NK cells, resting dendritic cells, and resting mast cells infiltrated significantly less (P-value < 0.001) (Fig. 9A). Here, CD4 is linked to rosacea.