SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2) is a potentially severe acute respiratory infection caused by the SARS-CoV-2 coronavirus.

It is a dangerous disease that has an undulating course and can occur both in the form of an acute respiratory viral infection of a mild course, and in a severe form.

The most common complication of the disease is viral pneumonia, which can lead to acute respiratory distress syndrome and subsequent acute respiratory and multiple organ failure.

The oxidative stress plays a role in the pathogenesis of COVID-19, perpetuates the cytokine storm cycle, blood clotting mechanism and exacerbates hypoxia. An interplay between oxidative stress and the cytokine storm is a mechanism that sustains and worsens the tissue injury, which terminates in organ failure.

The most common symptoms of the disease are fever, fatigue and dry cough.