CRP and COVID-19: Serum total oxidant status (TOS) and total antioxidant status (TAS) were measured, and the oxidative stress index (OSI) was calculated and correlated to the inflammatory mediators (IL-6, IL-8, IL-10, IP-10, CRP, SAA).<h4>Results</h4>COVID-19 patients exhibited a profound redox imbalance, characterized by elevated TOS and OSI, and depleted TAS compared to controls (<i>p</i> < 0.05).