Population-based Incidence of Myopericarditis after COVID-19 Vaccination in Danish Adolescents

Ulrikka Nygaard*, Mette Holm, Cathrine Bohnstedt, Qing Chai, Lisbeth Samsø Schmidt, Ulla Birgitte Hartling, Jens Jakob Herrche Petersen, Jesper Thaarup, Jesper Bjerre, Niels Grove Vejlstrup, Klaus Juul, Lone Graff Stensballe

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review


In this prospective nationwide multicenter study from Denmark, myopericarditis after Pfizer-BioNTech mRNA COVID-19 vaccination was identified in 13 males and 2 females between May 15 and September 15, 2021, among 133,477 vaccinated males and 127,857 vaccinated females 12-17 years of age, equaling 97 males and 16 females per million. In conclusion, the incidence of myopericarditis after COVID-19 vaccination among males appears higher than reports from the United States.

Original languageEnglish
JournalPediatric Infectious Disease Journal
Issue number1
Pages (from-to)E25-E28
Publication statusPublished - Jan 2022

Bibliographical note

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© 2021 Wolters Kluwer Health, Inc. All rights reserved.


  • adolescents
  • mRNA COVID-19 vaccine
  • myopericarditis


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