IFNG and COVID-19–associated multisystem inflammatory syndrome in children: Studies have reported increased levels of TNF, IL-1β, IFNγ, soluble IL-2R, CCL2, CCL3, CCL4, CXCL8, or IFNγ-induced chemokines CXCL9 and CXCL10 in the serum of MIS-C patients compared to those with pCOVID-19 or healthy controls [5, 35, 48, 58, 71, 74–80].