Interestingly, elevated plasma levels of ferritin (Figure 4A), catalase (Figure 4B) superoxide dismutase (Figure 4C), and lipid peroxidation (Figure 4F) were found in COVID-19 patients compared to HC individuals whereas no significant difference was observed in the levels of total antioxidant response (Figure 4D) and iron (Figure 4F) in the same set of samples. This evidence concerns the gene CAT and COVID-19.