There are higher expression levels of proinflammatory cytokines including IL-2, IL-7, IL-6, G-CSF, IP-10, MCP-1, MIP-1A, and TNFα in severe COVID-19 patients, indicating that the cytokine storm was caused (Huang et al., 2020; Ruan et al., 2020). This evidence concerns the gene IL6 and COVID-19.