Elevated levels of other inflammatory cytokines and chemokines such as interleukin-2 (IL-2) and interleukin-8 (IL-8), accompanied by increased neutrophils and eosinophils, may also lead to abnormal immune function in COVID-19 patients, further causing more immune cells to be activated and recruited into the lungs, causing “cytokine release syndrome” (CRS) [13–15]. Here, IL2 is linked to COVID-19.