A prior meta-analysis studying cytokine levels of severe COVID-19 patients with cytokine storm revealed that the mean serum IL-6 concentration was 36.7 pg/mL, 100 times lower than patients with cytokine release syndrome, 27 times lower than patients with sepsis, and 12 times lower than patients with ARDS unrelated to COVID-19 [6]. Here, IL6 is linked to COVID-19.