2021 Update on the Clinical Management and Diagnosis of Kawasaki Disease.

The 2017 American Heart Association (AHA) treatment guidelines have included changes in aspirin dosing (including both 80-100 mg/kg/day and 30-50 mg/kg/day treatment options), consideration of the use of adjuvant corticosteroid therapy in patients at high risk of IVIG resistance, and the change in steroid regimen for refractory KD to include both pulse-dose IVMP and longer course of prednisolone with an oral taper. A significant proportion of children diagnosed with MIS-C, a post-infectious syndrome of SARS-CoV-2 infection, meet criteria for Kawasaki disease. Further investigation is warranted to further delineate these conditions and optimize treatment of these conditions given the ongoing COVID-19 pandemic.