ADA and Autoimmunity: The contribution of the Th17/Treg imbalance to autoimmunity is different between MIS-C and KD, because the Th17 mediators are elevated in both diseases but the immunosuppressive mediators stem cell factor (SCF), negative regulator of INF-γ (TWEAK), and adenosine deaminase (ADA) in KD are lower than in MIS-C.