Background
The current outbreak of the coronavirus disease 2019 (COVID-19) has caused many severe cases of pneumonia. A messenger RNA (mRNA) vaccine against the COVID-19 virus has been in use since December 2020 [1]. However, this vaccine has been reported to cause adverse events, including cardiovascular ones, and the underlying mechanisms of these adverse events are unknown [2,3,4]. Herein, we report a rare case of acute myocardial infarction shortly after COVID-19 vaccination and partially clarify the pathogenesis of the acute myocardial infarction.