Several cases of myocarditis and pericarditis – inflammatory heart conditions – following vaccination have been reported in past months, fanning concerns about the overall safety of the jab. The Centers for Disease Control and Prevention estimated last week there were 4.8 cases of the condition per million. However, a new study investigating the likelihood of myocarditis following vaccination found the incidence of the condition was at 10 cases per million vaccinated.

The incidence of myocarditis in the study is higher than the Centers for Disease Control and Prevention’s estimate published last week.

The findings suggest that there may be more cases than are reported to the federal database for tracking adverse events following vaccinations.

A new study, published in the Journal of the American Medical Association, identified two distinct self-limited heart-related syndromes, myocarditis and pericarditis, in patients after administration of COVID-19 vaccinations.