OBJECTIVES: We aimed to measure severe acute respiratory syndrome coronavirus 2
(SARS-CoV-2) serological responses in children hospitalized with multisystem inflammatory
syndrome in children (MIS-C) compared with those with coronavirus disease 2019 (COVID-
19), those with Kawasaki disease (KD), and hospitalized pediatric controls. METHODS:
From March 17, 2020, to May 26, 2020, we prospectively identified hospitalized children with
MIS-C (n= 10), symptomatic COVID-19 (n= 10), and KD (n= 5) and hospitalized controls (n …