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(a) The LPO index significantly increased in the moderate and severe COVID-19 patients in comparison with HS. (b) The TAC significantly decreased in the moderate and severe COVID-19 patients in comparison to HS. (c) The NO2– concentration significantly decreased in the moderate and severe COVID-19 patients in comparison with HS. Abbreviations: LPO = Lipid peroxidation, TAC = Total antioxidant capacity, NO2– = Nitrites.
