CXCL8 and COVID-19: Expression levels of IL-6, TNF-α, IFN-γ, IL-10, IL-12p70, IL-1β, IL-8, IL-13, IL-2, IL-7, IL-17A, IL-5 and IL-7 were measured in saliva and serum pairs obtained from the COVID-19 patients with available baseline symptoms information.