Abstract
Due to the potential role of selenium in enhancing the immune system, a cross-sectional study was conducted to investigate the association between selenium serum levels, mortality rate, and inflammatory and immunity factors in patients diagnosed with COVID-19. A total 179 patients (60.3% male) with COVID-19 were enrolled into this study. The serum level of selenium was significantly correlated with white blood cell count, neutrophils, lymphocytes, and erythrocyte sedimentation rate in patients with COVID-19. No significant association was seen between serum selenium levels and IL-6, IFN-[gamma], and mortality rate.