Cohort study: Among children with Multisystem Inflammatory Syndrome (MIS-C) associated with Covid-19, initial treatment with intravenous immune globulin (IVIG) plus glucocorticoids was associated with a lower risk of new or persistent cardiovascular dysfunction than IVIG alone.

Multisystem Inflammatory Syndrome in Children — Initial Therapy and Outcomes – New England Journal of Medicine

Editorial: Immunotherapy for MIS-C — IVIG, Glucocorticoids, and Biologics