Free oxygen radicals are effective in the development and progression of viral infections. In this study, we aimed to evaluate the oxidative stress status in patients with COVID-19, a viral disease of our time. The study was carried out between March 2021-June 2021. Blood samples of 50 patients who applied to Medipol University Faculty of Medicine with suspected COVID-19 infection, corrected clinical and molecular diagnoses and were taken for routine evaluations were included in our study. In the healthy group, 50 serum samples taken prior to the COVID-19 pandemic were used. Total antioxidant status (TAS) and total oxidant status (TOS) levels were measured and the data obtained were compared statistically. TAS level in the COVID-19 group (1.470±0.269) was lower than the healthy group TAS level (1.491±0.286), but it was not statistically significant (p>0.05). TOS level in COVID-19 group was 13.962 (3.02±36.35) while it was as 7.925 (1.19±15.03) in the healthy group. The high TOS value in the COVID-19 group was found to be statistically significant compared to the healthy group (p