Abstract
Objective: Multisystem inflammatory syndrome (MIS-C) in children is an abnormal immune response that occurs after exposure to SARS-CoV-2. To our knowledge, there is no study demonstrating the efficacy and safety of the BNT162b2 mRNA vaccine in children who were diagnosed with MIS-C previously. In this study, we aimed to present the attitudes of MIS-C patients over the age of 12 years towards the COVID-19 vaccine, and the side effects of the vaccine in vaccinated patients.
Materials and Methods: The files of patients who were followed up with the diagnosis of MIS-C between May 2020 and January 2022 aged 12 years and over were reviewed retrospectively.
Results: Thirty-six patients (12 girls, 24 boys) were included in the study. The median age was 13.5 (12-17) years. Eight of the 36 patients (22.2%) were vaccinated at a median of 3 (3-6) months after the diagnosis of MIS-C. No side effects or disease reactivation was observed following vaccination. The most common reasons for patients' refusal to be vaccinated were having had the disease and being concerned about a recurrence.
Conclusion: This study showed that COVID-19 vaccination was safe in children who were diagnosed with MIS-C, although most of our patients were against it.