Several of these cytokines, including IL-6, have been found to be overexpressed and positively correlated with disease severity in COVID-19 patients (Costela-Ruiz et al., 2020; Weisberg et al., 2020; Jones and Hunter, 2021; Ma et al., 2021; Rubin et al., 2021). This evidence concerns the gene IL6 and COVID-19.