IL6 and COVID-19: In addition, inflammatory biomarkers such as procalcitonin, cardiac markers, WBC, lactate, creatinine, D-dimer, LDH, CRP, AST, interleukin 6 (IL-6), BNP, blood urea nitrogen, creatine kinase, bilirubin, and erythrocyte sedimentation rate levels have been found to be increased in severe/fatal COVID-19 and predictive of poor prognosis [4, 5].