evidence: While the rationale for coronavirus disease 2019 (COVID-19) vaccination is to reduce complications and overall mortality, some cardiovascular complications from the vaccine itself have been demonstrated. Myocarditis and pericarditis are recognized as rare acute adverse events after mRNA vaccines in young males, while evidence regarding other cardiovascular events remains limited and inconsistent. This study assessed the risks of several cardiovascular and cerebrovascular events in a Swedish nationwide register-based cohort. [...] Risk of myopericarditis (mRNA vaccines only), extrasystoles, and transient ischaemic attack was transiently increased after COVID-19 vaccination, but full vaccination substantially reduced the risk of several more severe COVID-19-associated cardiovascular outcomes, underscoring the protective benefits of complete vaccination. [...] In this unique, complete nationwide cohort, we found decreased risks of several serious cardiovascular outcomes after COVID-19 vaccination, likely related to the protection of vaccination against severe COVID-19. Increased risks were observed for two relatively mild cardiovascular conditions, i.e. extrasystoles and TIA. We confirmed previously reported increased risks of myocarditis and pericarditis shortly after COVID-19 mRNA vaccination.3 Overall, our results clearly underscore the protective benefits of complete vaccination, especially for elderlies.