CXCL9 and COVID-19: CXCL9 was 3,145.5 pg/ml [120.7 to 7381.7] vs 210.3 pg/ml [45.7 to 428.5], respectively, p = 0.0014; Figure 3E, and CXCL10 was 9,339.1 pg/ml [311.3 to 19,402.4] in MIS-C vs 812.1 pg/ml [244.2 to 6,973.4] in COVID-19, p = 0.009; Figure 3F.