IL6 and COVID-19: Some laboratory biomarkers including C-reactive protein (CRP), interleukin 6 (IL-6), ferritin, D-dimer, lactate dehydrogenase (LDH), leukopenia and cardiac troponin (cTn), in addition to clinical symptoms, such as fever have been identified as markers of MIS and cytokine storm associated with COVID-19 (21–23).