The overexpression of chemokines mainly produced by monocytes and macrophages, such as IL-8, IP-10, MIP1 and MCP-1, is directly related to the severity of the disease in patients and is key for the infiltration of immune cells into the lung and, therefore, the severity of COVID-19 [6,20,21,22]. The gene discussed is CXCL8; the disease is COVID-19.