Plasma levels of cytokines in children with non-severe and severe COVID-19. Plasma levels of IFN-α2, IL-12p70, MCP-1 (CCL2), IL-6, IL-8, IL-1β, TNF-α, IFN-γ, IL-17A, IL-18, IL-33, and IL-10 were quantified by multiplex flow cytometric bead array in the acute (non-severe, n=17; severe, n=8) and convalescent (non-severe, n=3; severe, n=9) phases of infection. Median and min to max of n donors are shown. P values were determined by Mann-Whitney U test: * p<0.05, ** p<0.01, *** p<0.001, **** p<0.0001. Non-severe (white circle), severe (purple circle).