How common are heart problems after COVID-19 mRNA jabs?

Embargoed until: Publicly released: 2022-04-21 01:00

International

Moderna_COVID-19_vaccine_(2021)_G By Governor Tom Wolf - CC BY 2.0

A study of more than 23 million people living in the Nordic Region found myocarditis or pericarditis occurred in between four and seven cases per 100,000 vaccine recipients after receiving two Pfizer jabs, and between nine and 28 cases per 100,000 recipients after two Moderna jabs. The risk of myocarditis was highest among young males (aged 16-24 years) after the second dose, the scientists say. This risk should be balanced against the benefits of protecting against severe COVID-19, the researchers conclude.

Media release

From: JAMA

Assessing Risk of Myocarditis Following SARS-CoV-2 Vaccination

What The Study Did: The risks of myocarditis and pericarditis after SARS-CoV-2 mRNA vaccinations were assessed by vaccine, dose number, sex and age among 23.1 million residents of Denmark, Finland, Norway and Sweden.

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Journal/
conference: JAMA Cardiology

Research:Paper

Organisation/s: Swedish Medical Products Agency, Sweden

Funder: No information provided.

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