IL6 and COVID-19: Additionally, a wide range of nonspecific indicators of systemic inflammation, including among others C-reactive protein (CRP), ferritin, serum amyloid A (SAA), procalcitonin, lactate dehydrogenase (LDH), D-dimer, IL-6, IL-10, white cell count (WCC), or neutrophil count, have been associated with adverse COVID-19 outcomes (36–39).