Several studies (Chen et al. 2020b; Fang et al. 2020; Huang et al. 2020) shared the same findings: elevated IL-6 levels existed in biological fluids of COVID-19 patients, and IL-6 might serve as a predictive biomarker for severity of COVID-19 infection (Gao et al. 2020). The gene discussed is IL6; the disease is COVID-19.