COVID infection tied to much higher risk of myocarditis than vaccines areUK researchers estimate that an additional 2, 1, and 6 cases of myocarditis occur per 1 million people in the week after one dose of the AstraZeneca/Oxford, Pfizer/BioNTech, and Moderna COVID-19 vaccines, respectively, while a positive SARS-CoV-2 test was tied to much higher odds of that and other serious heart conditions.The data, published today in Nature Medicine, also show an extra 10 myocarditis cases per 1 million people in the 28 days after a second Moderna dose, compared with 40 in the 28 days after a positive COVID-19 test.
Increased cases of pericarditis and abnormal heart rhythms were also seen among those with a COVID-19 diagnosis but not in those who