Several biomarkers, such as high neutrophil-to-lymphocyte ratio, high creatinine, lactate dehydrogenase (LDH), direct bilirubin, alanine aminotransferase (ALT), D-dimer, CRP, serum ferritin, interleukin-6 (IL-6), and procalcitonin (PCT), were associated with a higher mortality risk in patients with COVID-19 [1]. Here, IL6 is linked to COVID-19.