Neutrophil Markers as Predictors of COVID-19 Severity at Hospital Admission: A Cross-sectional Study.

COVID-19 is capable of undermining self-tolerance in a host's immune system and triggering autoimmunity by hyper-activating the innate and adaptive immune systems, which has not investigated in Iranian society until now. In the innate immune system neutrophils are the predominant immune cells that protect the human body against invaders. Here, we sought to explore 2 important variables related to neutrophil: DNA complexes with myeloperoxidase (MPO-DNA) as a reliable indicator of neutrophil extracellular traps (NETs) by MPO-DNA complex evaluation using a sandwich ELISA and the underlying role of IL-8 in (NETs) formation during COVID-19 infection.