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Updated: Aug 30, 2025

Delivery of Modified mRNA in a Myocardial Infarction Mouse Model
Published on: June 11, 2020
[Myocarditis following mRNA vaccine]
Anna Formanek1, Thomas Wagner2, Stephan Newrkla3
1Department of Paediatrics and Youth Medicine, Clinic Donaustadt, Langobardenstr. 122, 1220, Wien, Österreich. anna.formanek@gesundheitsverbund.at.
Abstract:
This article presents the case of a 15-year-old adolescent presenting with myocarditis 4 days after receiving the 2nd dose of BNT162b2 mRNA vaccine (Comirnaty®) with no other identifiable cause. The main clinical symptom at presentation was chest pain. We found an elevated level of Troponin‑I with preserved left ventricular systolic function. The cardiac MRI showed a clear pathologic result. With symptomatic therapy and strict bed rest, the symptoms resolved quickly and revealed a mild course.
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