IL6 and COVID-19: A systematic review on serum biomarkers for prediction of COVID-19 outcome included 1584 patients in their pooled analysis and found that the biomarkers that were noted to be significantly higher in those patients who died from coronavirus disease included: WBC, neutrophil count, CRP, high sensitivity C-reactive protein, procalcitonin, ferritin, D-dimer, interleukin-6, LDH, creatine kinase, prothrombin time, aspartate aminotransferase, alanine aminotransferase, total bilirubin, and creatine.