IL6 and COVID-19: Age and associated comorbidities are the known risk factors for COVID-19 severity. Recently published meta-analyses including 16 studies [19] have evaluated various panels of circulating biomarkers for detecting the severity of COVID-19 and reported lower levels of C-reactive protein (CRP), procalcitonin, IL-6, erythrocyte sedimentation rate (ESR), serum amyloid A, and ferritin in non-severe COVID-19 group [20].