CD4 and atherosclerosis: The activation of immunity is closely related to atherosclerosis, and the imbalance of regulatory and pathogenic immunity may promote the development of atherosclerosis.7 Atherogenesis involves various immune cells, particularly CD4+ T‐helper cells.8, 9 Th17 and Treg cells, as newly discovered CD4+ T cells, are closely related to inflammation, which might affect the plaque degeneration and the onset of ACS.