IL6 and COVID-19: In contrast, IL6 concentrationsare much higher in severe sepsis (1652 pg/mL; 60 pM) or septic shock(8518 pg/mL; 320 pM)9 More recently, IL6has also been associated with severe COVID-19 (SARS-CoV-2) infection.From preliminary studies, high levels (>3.5 pM)10 of IL6 were correlated with respiratory failure and death,making this cytokine an important prognostic marker for the diseaseand pandemic progression.11 For cytokine,in particular, IL6, detection and quantification represent a significanttool for precise monitoring of various diseases.