Iron (II,III) levels (87.3 ± 30.9 vs. 72.8 ± 28.2, P < 0.05) and transferrin saturation (25.1 ± 9.52 vs. 20.6 ± 7.81, P < 0.05) were significantly decreased 3-months post-COVID-19 patients compared to healthy controls (Table 3). This evidence concerns the gene TF and COVID-19.