Top 5 Takeaways

  1. Low incidence of sudden cardiac death post-vaccination: Among 1,292 deaths of Oregon residents aged 16–30 during the study period, only three sudden deaths occurred within 100 days post mRNA COVID-19 vaccination, suggesting no significant association with vaccination.
  2. Background of myocarditis concerns: Initial reports of myocarditis in young males post-vaccination led to this detailed assessment; however, the study concluded myocarditis is rare and typically non-fatal, reaffirming vaccine safety in young populations.
  3. Extensive data review: Investigators examined death certificates for cardiac or undetermined causes and cross-referenced with vaccination records, establishing a comprehensive review process that found minimal risk related to vaccination.
  4. Comparative risk analysis: Data showed a higher risk of cardiac complications from COVID-19 infection than from vaccination, emphasizing the protective benefits of the vaccine.
  5. Public health implications: The findings support ongoing COVID-19 vaccination recommendations for all persons aged ≥6 months to prevent severe COVID-19 outcomes, with no associated increased risk of sudden cardiac death in young, healthy individuals.

Original Article Author and Citation

Corresponding Author

Juventila Liko, MD —

Suggested Citation

Liko J, Cieslak PR. Assessment of Risk for Sudden Cardiac Death Among Adolescents and Young Adults After Receipt of COVID-19 Vaccine — Oregon, June 2021–December 2022. MMWR Morb Mortal Wkly Rep 2024;73:317–320. DOI:


This study investigates the risk of sudden cardiac death in young individuals following mRNA COVID-19 vaccination, using data from Oregon’s death certificates and vaccination records. It finds a very low incidence of sudden cardiac deaths related to vaccination, reinforcing the safety and importance of the vaccine.


The study reviewed death certificates for Oregon residents aged 16–30 years from June 2021 to December 2022, identifying causes of death and vaccination status. Records from Oregon’s ALERT Immunization Information System were used to verify vaccination timing.


The data analysis revealed that the risk of sudden cardiac death within 100 days of vaccination is extremely low. The study emphasizes that myocarditis, while a concern, remains rare and typically resolves with minimal health impacts.


The findings demonstrate no significant association between mRNA COVID-19 vaccination and sudden cardiac death among adolescents and young adults. Public health practices continue to recommend COVID-19 vaccination for all eligible age groups to prevent serious health outcomes related to the virus.

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