In COVID-19, high levels of serum pro-inflammatory cytokines (IFN-γ, IL-1, IL-6, IL-12, and TGFβ) and chemokines (CCL2, CXCL10, CXCL9, and IL-8) have been reported to be detected in cases with severe disease compared to patients with uncomplicated SARS (11). Here, IL6 is linked to COVID-19.