High levels of cytokines (IL-2, IL-4, IL-6, IL-7, IL-8, IL-10, G-CSF, IP10, MCP-1, MIP-1A, TNF, and IFN-γ) were detected in sera of patients with severe COVID-19 illness [9, 18, 19]. The gene discussed is CXCL10; the disease is COVID-19.