Concerning the interferons levels, it was observed that the levels of IFN-α (Figure 2B), IFN-β (Figure 2C), and IFN-γ (Figure 2D) in the severe COVID-19 group were higher than in the mild B (p = 0.004, p = 0.009, and p = 0.02, respectively), others (p = 0.001, p = 0.04, and p = 0.0009, respectively) and negative (p = 0.006, p = 0.001, and p = 0.007, respectively) groups. This evidence concerns the gene IFNA1 and COVID-19.