Abstract: Background: The neutrophil-lymphocyte ratio is one indicator of a systemic inflammatory response that is widely used as a determinant of the prognosis of patients with viral pneumonia. An increased neutrophil-lymphocyte ratio may reflect an increased inflammatory process and may be associated with a poor prognosis. The increased neutrophil-lymphocyte ratio was significantly associated with the severity of the disease. Increased neutrophil-lymphocyte ratio can be considered independent biomarkers in indicating poor outcomes.