The optimal severe acute respiratory syndrome coronavirus 2 vaccine strategy for patients with a history of multisystem inflammatory syndrome in children (MIS-C) is unclear. We performed an international survey (32 countries) and found substantial variations in vaccine policies. Respondents did not report relapses of MIS-C or other severe inflammatory side effects after severe acute respiratory syndrome coronavirus 2 vaccination in 273 patients with a history of MIS-C.
L.H. was funded by the VIB Grand Challenge Programs and FWO-TBM (T004721N). F.H. is supported by Ghent University research grant (BOF-UGent), VIB Grand Challenges Programs, and the Jeffrey Modell Foundation. A.S.-A. is supported by the Departments of Health and Education of the Government of Catalonia (Spain) for the coronavirus disease 2019 Sentinel School Network project. P.O. has received funding by the Instituto de Salud Carlos III (Contrato Juan Rodés, JR18/00042), Madrid, Spain.