U.S. CDC Confirms Additional Myocarditis and Pericarditis Cases

The US Centers for Disease Control and Prevention (CDC) reported as of June 28, 2021, the Vaccine Adverse Event Reporting System (VAERS) had received 780 reports of myocarditis or pericarditis among people ages 30 and younger who received a COVID-19 vaccine.

Through follow-up, including medical record reviews, the CDC and U.S. FDA have confirmed 518 reports of myocarditis or pericarditis.

Most cases have been reported after mRNA COVID-19 vaccination (Pfizer-BioNTech or Moderna), particularly in male adolescents and young adults. However, an ongoing review of available clinical information, including death certificates, autopsy, and medical records, has not established a causal link to COVID-19 vaccines. 

Reports of adverse events to VAERS following vaccination, including deaths, do not necessarily mean that a vaccine caused a health problem. The CDC stated it is investigating these reports to assess whether there is a relationship to COVID-19 vaccination.