CXCL8 and COVID-19: Previous studies have already shown that individuals with COVID-19 had high levels of some inflammatory mediators in more severe cases of the disease, such as C-reactive protein, D-dimer, bilirubin, urea, and IL-1β, IL-6, IL-8, IL-10, IL-18, IFN, TNF-α cytokines [4,5,6,7].