evidence: New research highlights the exclusive occurrence of myocarditis and pericarditis in vaccinated adolescents and children, suggesting a need for reevaluation of COVID-19 vaccination strategies in younger populations while considering broader clinical implications for post-vaccination adverse events. A recent preprint from Oxford University researchers reveals that myocarditis and pericarditis only occur in children and adolescents following COVID-19 vaccination, not infection. The study, which evaluated more than a million English minors, found that vaccinated adolescents experienced higher incidences of these heart inflammations compared to children. Despite this, vaccinated adolescents had lower chances of COVID-19 infection and severe outcomes than their unvaccinated counterparts. [...] - Most myocarditis and pericarditis cases occurred after the first vaccine dose, with more than half requiring hospitalization or emergency care.