Moreover, COVID-19 convalescents were noted to contain peripheral blood autoantibodies against various cytokines (IFN-α, IFN-ω, IFN-γ, IL-1β, IL-6, IL-10, IL-17, IL-21, and GM-CSF) and chemokines (CCL2, CXCL1, CXCL7, CXCL13, and CXCL16) (101, 102). Here, IL6 is linked to COVID-19.