IL6 and COVID-19: Inflammatory biomarkers were shown to be associated with COVID-19 morbidity and mortality in men and women: interleukin 6 (IL-6) as main inducer of C-reactive protein (CRP) in the liver (9), neopterin reflecting macrophage activation and thus T-helper cell type I (Th1) immune response (10) as well as other acute phase proteins including procalcitonin (PCT) and ferritin (11).