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Changes in the total oxidant status (TOS) and activity of antioxidant enzymes in plasma samples of COVID-19 patients. (A) The TOS, (B) Catalase activity, and (C) Superoxide dismutase activity were investigated in the plasma of COVID-19 patients and healthy controls using ELISA. An independent sample t-test was used to examine the difference across studied groups. *P-value ≤0.05; ***P-value ≤0.001.
