Moreover, a significant correlation between COVID-19 severity and the serum concentrations of IL-1, IL-2, IL-6, IL-7, IL-10, TNF-α, G-CSF, CCL2, CCL3, CXCL8, and CXCL10 has been observed [33,46,47,48,49]. This evidence concerns the gene CXCL10 and COVID-19.