CRP and COVID-19: Moreover, Li et al. demonstrated a higher count of WBCs, NEUs, LYMs, CRP, fibrinogen, D-dimer, creatine kinase, and LDH levels in severe COVID-19 patients compared to their non-severe counterparts, and strong correlations between CRP and LDH and other indices were observed, which suggested that these two variables had a significant impact on the severity of COVID-19 (30).