Abstract Objectives The aim of this study was to evaluate the relationship between systemic oxidative balance, and severity disease in patients with COVID 19. Methods Sixty-four were divided into three groups according disease: mild (n=28), moderate (n=11) severe (n=25). Twenty-four healthy controls included study. Proinflammatory cytokines (IL-6 TNF-?), D-dimer, fibrinogen, total status (TOS),...