Syringes with a shot of Novavax’s COVID-19 vaccine in Berlin, Germany, on Feb. 28, 2022. (Carsten Koall/Getty Images) A higher than expected number of heart inflammation cases have occurred in people who received Novavax ’s COVID-19 vaccine, researchers reported in a new study.
Sixty-one cases of myocarditis , pericarditis, or both following a Novavax vaccination were reported in the World Health Organization’s vaccine safety database through Aug. 23, 2022, Spanish researchers found.
Using pre-pandemic rates of heart inflammation in the population, the researchers calculated that the number of post-vaccination cases was higher than expected.
Reporting odds ratio values of higher than one indicate a higher-than-expected rate. For myocarditis following Novavax vaccination, the ratio was 5.2. For pericarditis, it was 24.75. For myopericarditis, or both conditions at once, it was 14.4.Heart inflammation is a known side effect of the Pfizer and Moderna COVID-19 vaccines, which utilize messenger RNA (mRNA) technology, but little data […]
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