IL6 and Sepsis: Procalcitonin (PCT) and interleukin-6 (IL-6) have become popular biomarkers for predicting the prognosis of sepsis in the last decade (Ruiz-Rodriguez et al., 2012; Jekarl et al., 2013; Mat-Nor and Md Ralib, 2014; Mat-Nor et al., 2016).