Significant positive correlations were observed between biochemical and hematological parameters in case of COVID-19 patients (CRP × N/L (r = 0.40; p < 0.05), CRP × LDH (r = 0.50; p < 0.05); ESR × LDH (r = 0.42; p < 0.05); LDH × N/L (r = 0.37; p < 0.05). Here, CRP is linked to COVID-19.