IL6 and COVID-19: C-reactive protein (CRP), Tumor Necrosis Factor-α (TNF- α) (9), interleukin-6 (IL-6), IL-8, CXCL10, peripheral inflammation biomarkers linked to COVID-19 severity, also predict sequelae (8, 10–13), as well as Type I and Type III interferons (IFN) (14).