The analysis of the clinical parameters (number of white blood cells, % lymphocytes, C-reactive protein, and erythrocyte sedimentation rate) as standard clinical inflammatory markers and the measured basic parameters of oxidative status in the organism (TBARSs, AOC, SOD, CAT, GRA) showed complete correlation between the data of the tested healthy subjects and the COVID-19 patients (r = +0.995), (Figure S1). Here, SOD1 is linked to COVID-19.