As presented in Table 2, when compared to controls, COVID-19 patients independently on their disease severity had lower plasma levels of ALB (by 42%) but significantly higher levels of AGP (by 2.4-fold), AAT (by 1.9-fold), CP (by 1.4-fold), HP (by 3.8-fold), and hs-CRP (by 52-fold). This evidence concerns the gene SERPINA1 and COVID-19.