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Table 1 Calculation of the Neutrophil Lymphocyte Ratio (NLR)

From: Prognostic factors in patients admitted to an urban teaching hospital with COVID-19 infection

Neutrophil Lymphocyte Ratio (NLR): Ratio SIRS severity
Neutrophil count: lymphocyte count  < 3 Mild
Neutrophil count: lymphocyte count 3–5 Moderate
Neutrophil count: lymphocyte count  > 5 Severe