evidence: Clinical Considerations: Myocarditis and Pericarditis after Receipt of COVID-19 Vaccines Among Adolescents and Young Adults Cases of myocarditis and pericarditis have rarely been observed after COVID-19 vaccination in the United States and evidence from multiple vaccine safety monitoring systems in the United States and around the globe supports a causal association between mRNA COVID-19 vaccines (i.e., Moderna or Pfizer-BioNTech) and myocarditis and pericarditis. [...] - COVID-19 vaccination is recommended for everyone ages 6 months and older in the United States for the prevention of COVID-19. CDC recommends that people stay up to date with COVID-19 vaccination.