Acute myocarditis after a first dose of COVID-19 mRNA vaccination: an uncommon but potentially serious adverse effect

Introduction The coronavirus disease 2019 (COVID-19) pandemic, associatedwith the infection of the severe acute respiratory syndromecoronavirus2 (SARS-CoV-2), started in late2019 in China before spreading all over the world. Symptoms include fever, cough, loss of taste and/or smell, dyspnea, and thromboembolic manifestations. It is a potentially lethal disease particularly in patients with clinical risk factors (elderly, immunocompromised, obese, hypertensive, and others) responsible for >6 million deaths all over the world at the time of writing.