CCL4 and COVID-19: Compared with those in healthy individuals, the levels of IFN-γ, IL-12 (p70), IL-13, IL-1β, IL-2, IL-4, IL-5, IL-6, GM-CSF, IL-17A, IL-27, IFN-α, IL-15, IL-1RA, IL-7, eotaxin, GRO-α, IP-10, MCP-1, MIP-1α, MIP-1β, SDF-1α, and RANTES in mild COVID-19 patients were significantly greater.