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The researchers combined data about vaccinations from the Danish Vaccination Register with data about hospital-based diagnoses from the country’s National Patient Register to visualize post-vaccine health outcomes for Denmark’s entire population over 12 years old. However, why this vaccine causes myocarditis is still unknown,” she confirmed. Myocarditis has been reported with other vaccines in the past, so it is also not surprising to find with this vaccine. “This study also confirms that these cases are mild, similar to data from the U.S. Stempien-Otero was not involved in the recent research. April Stempien-Otero, a cardiologist at the University of Washington Medical Center’s Heart Institute, in Seattle, told Medical News Today. “The percentage of myocarditis cases associated with vaccination is not surprising, as it is very similar to studies in the United States and Israel,“ Dr. However, the absolute rates of these conditions after the vaccinations were low. They found that mRNA vaccination against COVID-19 was linked to a significantly increased risk of both heart conditions. In a recent study, researchers from Denmark analyzed national healthcare data to identify links between mRNA vaccination and a diagnosis of myocarditis or myopericarditis. Currently, little publicly available research has assessed the incidence of the conditions in a complete population. The Centers for Disease Control and Prevention (CDC) and the European Medicines Agency are engaged in ongoing investigations to confirm and clarify any link. However, scientists have observed a similar link with the smallpox vaccine in adults. The underlying cause of the link between COVID-19 vaccines and myocarditis is unclear.
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Evidence suggests that it occurs especially after the second booster dose of the Pfizer and Moderna mRNA vaccines. The inflammation is usually triggered by viral, bacterial, or fungal infection. In the most severe cases, both conditions can lead to heart failure and death. Myocarditis is inflammation of the heart muscle, while myopericarditis is inflammation of the membrane around the heart. Previous research has suggested a link between SARS-CoV-2 vaccination and myocarditis and myopericarditis.
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