IL6 and COVID-19: Meta-analyses based on studies of clinical laboratory findings comprise an additional tool for predicting the severity of COVID-19 and have revealed that the cytokine storm represents one of the main determinants of the progression and deterioration of pneumonia related to SARS-CoV-2 and that lymphopenia, thrombocytopenia, and elevated levels of IL-6, ferritin, D-dimer, aspartate aminotransferase, CRP, procalcitonin, creatinine, neutrophils, and leukocytes are associated with severe disease and death from COVID-19 [16, 17].