Heart inflammation risk in young men higher after vaccination than after Covid-19: study

A 39-year-old man has a higher risk of heart inflammation after being vaccinated with the Moderna COVID-19 vaccine than after being infected with COVID-19, according to a new study.

British researchers analyzed patients vaccinated between 1 December 2020 and 15 December 2021 who were hospitalized with myocarditis, a form of health inflammation.

They estimate that a second dose of Moderna’s vaccine leads to 97 cases of myocarditis per million cases above baseline in the first 28 days after vaccination in men under 40 years of age. Millions of myocarditis after positive COVID-19 test but before vaccination. [page 9, delete]

The researchers also found that the first dose of Pfizer’s vaccine led to 4 additional myocarditis events per million men under the age of 40, while the first dose of Moderna’s vaccine led to 14 additional myocarditis events per million. presumed to have led to additional cases of myocardial inflammation. Associated with 14 additional myocarditis events per million in this age group.

Both the Moderna and Pfizer vaccines have long been associated with heart inflammation, but the Moderna vaccine was associated with much higher rates.

Moderna and Pfizer did not respond to requests for comment.

“Vaccine-associated myocarditis was primarily confined to men under the age of 40, with one exception. Both women had an increased risk of myocarditis.

This study was published by the American Heart Association (pdf) in the journal Circulation.

Dr. Sanjay Verma, an American cardiologist, told the Epoch Times that the dozens of deaths from post-vaccination myocarditis that researchers found were mild and usually spontaneous. He said it contradicted U.S. officials’ repeated claims that he could be cured of cancer.

Researchers found that 51 patients died after AstraZeneca injections and 49 died after Pfizer injections. There is none. Most of those who died were middle-aged or elderly.

Vinay Prasad, PhD, professor of epidemiology at the University of California, San Francisco, said on Twitter that the study provided further evidence for the argument that Moderna should be banned for those under 40.

Walid Gellad, a professor at the University of Pittsburgh School of Medicine, said an advisory panel for the Centers for Disease Control and Prevention should address post-vaccination heart inflammation directly when it meets in September to discuss future vaccination plans. said it is.


In this study, between December 2020 and December 2021, patients aged 13 years and older who received at least one dose of Pfizer, Moderna, or AstraZeneca vaccines were hospitalized for myocarditis or died of myocarditis. I analyzed people’s records.

Some of those who received the vaccine tested positive for COVID-19 and suffered from myocarditis before receiving the dose.

By taking the numbers and slicing the population between those under 40 and those over 40, the researchers derived incidence ratios or risk estimates for each sex by age and total population.

Myocarditis and two other forms of inflammation of the heart, pericarditis and pericarditis, are most common among young people, especially young men.

Studies and records from many countries, including the United States, show that young men are at higher risk of myocarditis after vaccination than with COVID-19. Some studies have shown that vaccinated people are at higher risk of heart inflammation than unvaccinated people.

British researchers found an increased risk of heart inflammation after the first shot of AstraZeneca’s jab. Pfizer vaccine 1st, 2nd, 3rd. The second and third doses of Moderna vaccine to the entire study population were at increased risk after positive COVID-19 tests before and after vaccination.

“Across this large data set, we found that during the critical 12 months of the pandemic when a COVID-19 vaccine was first available, the overall COVID-19-vaccinated population in the UK was significantly less likely to develop post-COVID-19 myocarditis. We found that the risk of myocarditis was very high compared to the risk of myocarditis after COVID-19 infection,” said lead author Martina Paton, a statistician in the Department of Primary Health Sciences at the University of Oxford. said in a statement.

“It is important that the public understand that myocarditis is rare and that the risk of developing myocarditis after vaccination with COVID-19 is also rare. It is also important to understand who is at increased risk of myocarditis and which vaccine types are associated with increased risk of myocarditis. ‘ says Nicholas Mills, a professor at Edinburgh University and another author.

This research was funded by the UK government.

Enrico Trigoso contributed to this report.

Zachary Stever


Zachary Stieber covers US and world news. He is based in Maryland.