Furthermore, as recent studies have shown that there is a strong correlation between the MIF serum level and COVID-19 severity, suggesting that the MIF serum level may be a useful predictor of COVID-19 disease severity (Aksakal et al., 2021; Bleilevens et al., 2021; Dheir et al., 2021), we focused our analysis on CCI diversities in the MIF pathway for the remainder of this study. This evidence concerns the gene MIF and COVID-19.