IL6 and COVID-19: De Biasi et al. [15] showed that patients with severe COVID-19 have higher plasma levels of several cytokines and chemokines, including tumor necrosis factor (TNF), interferon-gamma (IFN-γ), interleukin 1 alpha (IL-1α), IL-1β, IL-4, IL-6, IL-7, IL-8, IL-10, CCL2, or CCL3.