evidence: Acute myocarditis most commonly results from a viral infection1, including infection with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the virus that causes coronavirus disease 2019 (COVID-19). Although rare, acute myocarditis can also occur after vaccination, such as with the vaccine against smallpox or, as seen more recently, the vaccines against COVID-19, in particular those based on mRNA technology (Pfizer-BioNTech BNT162b2 and Moderna mRNA-1273). The risks of acute myocarditis associated with SARS-CoV-2 infection and after COVID-19 mRNA vaccination have garnered intense social media attention. A consistent point in these heated arguments is that the risks of hospitalization and death associated with COVID-19 are greater than the risks linked with the vaccine. Furthermore, COVID-19 vaccination reduces the relative risk of myocarditis and arrhythmia manifold, and myocarditis related to COVID-19 mRNA vaccination occurs mostly in young adults and is mild in most cases. Therefore, given that post-mRNA-vaccine myocarditis is rare and usually resolves within a few days or weeks, COVID-19 vaccination should be recommended in adolescent and adult populations. [...] Witberg, G. et al. Myocarditis after Covid-19 vaccination in a large health care organization. N. Engl. J. Med.https://doi.org/10.1056/NEJMoa2110737 (2021).