![]() You can learn more about how we ensure our content is accurate and current by reading our editorial policy. ![]() We link primary sources - including studies, scientific references, and statistics - within each article and also list them in the resources section at the bottom of our articles. ![]() Medical News Today has strict sourcing guidelines and draws only from peer-reviewed studies, academic research institutions, and medical journals and associations. Who is affectedįortunately, most vaccine-related myocarditis and pericarditis are mild and resolve quickly. It is rare after the first shot and even rarer after booster shots. The rare cases of myocarditis or pericarditis most often occur within 7 days after receiving a second dose of an mRNA COVID-19 vaccine. This side effect pattern has not been linked to the Janssen (Johnson and Johnson) COVID-19 vaccine, an adenovector vaccine. The United Kingdom Government also acknowledged it as a rare side effect of their Novavax vaccine. Types of vaccinesĪccording to the Centers for Disease Control and Prevention (CDC), receiving mRNA COVID-19 vaccines ( Moderna and Pfizer BioNTech) poses a rare risk of myocarditis or pericarditis. This led experts to believe that COVID-19 vaccines may trigger these heart-related complications. Recent studies show a clear temporal relationship between having pericarditis, myocarditis, or both after COVID-19 vaccination. Meanwhile, pericarditis is the inflammation of the outer lining of the heart.īoth conditions occur when the body’s immune system produces inflammation in response to an infection or another trigger. Myocarditis is the inflammation of the heart muscle. Share on Pinterest Design by MNT Photography by ti-ja/Getty Images & NikiLitov/Getty Images
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