CXCL9 and COVID-19: The first five of these cytokines/chemokines are elevated in both the MIS-C and COVID-19 groups, with levels higher in MIS-C than in COVID-19: IL-6 (2.6), MIG (12.7), IP-10 (28.7), IL-15 (1.33) and IL-22 (1.1), where the numbers in parenthesis denote the fold-change in median levels in MIS-C over that in COVID-19 patients.