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Most notably with the COVID-19 vaccines, adolescent boys and young men were at somewhat higher risk for a rare heart problem known as myocarditis.—Karen Weintraub, USA Today, 29 May 2025 The committee also heard evidence about the risk of myocarditis, or heart inflammation, which is very rarely associated with Covid-19 vaccination.—Brenda Goodman, CNN Money, 27 May 2025 In addition, heavy exercise done while experiencing a respiratory viral illness can lead to chronic fatigue and even exacerbate myocarditis, or inflammation of the heart muscle, according to a 2021 study published in the journal BMJ Open Sport & Exercise Medicine.—Melanie Radzicki McManus, CNN, 7 Mar. 2025 Covid vaccines do come with a very small risk of myocarditis — inflammation of the heart muscle — but the risk is much higher after an infection with the virus itself.—Aria Bendix, NBC News, 24 Feb. 2025 See All Example Sentences for myocarditis
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