Serious heart problems from mRNA vaccines are really rare

Embargoed until: Publicly released: 2021-10-05 02:00

International

U.S. Army Southern European Task Force, Africa

Heart problems - acute myocarditis - were rare in a study of almost 2.4 million Americans who’d had at least one dose of a COVID-19 mRNA vaccine. There were almost six cases per million individuals after the second dose - and just one case per 172,414 in fully-vaccinated individuals. Reflecting the findings of earlier research, all affected patients were men younger than 40 with no prior history of heart problems, and all were discharged from hospital after a week of conservative management. The authors say this study is unique in its ethnic diversity, and in reflecting real-world practice.

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Editorial / Opinion JAMA, Web page note there is an associated editorial

Journal/
conference: JAMA Internal Medicine

Research:Paper

Organisation/s: Kaiser Permanente Los Angeles Medical Center, Kaiser Permanente Southern California, Kaiser Permanente Orange County Medical Center, US

Funder: N/A. Conflict of Interest Disclosures: None reported

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