IL17A and COVID-19–associated multisystem inflammatory syndrome in children: However, it differs from KD in terms of the activated T-cells subset and IL-17A (which pushes forward the cytokine storm in KD, but not in MIS-C), the different biomarkers from arterial lesions, but especially through multiple autoantibodies with pathogenic potential in the pathophysiology of MIS-C, molecularly distinct and through the immune profiles of all other diseases analyzed.