The risk of myocarditis due to the COVID-19 vaccine is also increased by booster vaccination

Many myocarditis and pericarditis suspected to be caused by inoculation have been reported in vaccines against the new coronavirus. A research team led by Oxford University has published a new paper that, as a result of actual research, there is certainly an increase in myocarditis, and age-specific analysis shows that the risk is only seen in those under 40 years old. We are also investigating cases of booster inoculation and publishing papers.

Risks of myocarditis, pericarditis, and cardiac arrhythmias associated with COVID-19 vaccination or SARS-CoV-2 infection | Nature Medicine

Risk of myocarditis following sequential COVID-19 vaccinations by age and sex | medRxiv
https://doi.org/10.1101/2021.12.23.21268276

The research team is targeting people who have been vaccinated with the so-called 'Pfizer vaccine', 'Moderna vaccine', 'AstraZeneca vaccine', and those who are positive for the new coronavirus (SARS-CoV-2), such as arrhythmia, myocarditis, and pericarditis. Conducted a flame risk survey. As a result, we confirmed that the risk of myocarditis increased after vaccination and after a positive reaction.

According to the paper, the estimated risk of myocarditis 28 days after the first vaccination was 1 for AstraZeneca per 1 million vaccinations, 2 for Pfizer vaccinations, and 100 for Moderna vaccinations. 6 people increase per 10,000 people. The risk of myocarditis 28 days after the second vaccination was increased by 10 for Moderna.

The risk of myocarditis 28 days after a positive SARS-CoV-2 reaction is 40 per million.

The study also conducted age-specific risk studies and found that the mRNA vaccines Pfizer and Moderna had an increased risk of myocarditis only under the age of 40.

The research team also investigated the risk of booster vaccination and showed that Pfizer vaccines have an increased risk of myocarditis in 13 people per million. It should be noted that the papers on booster vaccination have not yet been peer-reviewed.

By the way, the Ministry of Health, Labor and Welfare has also released materials on the risk of myocarditis and pericarditis, and concludes that 'even if there is a risk, the benefits of vaccination are considered to be greater.'

Is it true that some people get myocarditis or pericarditis when vaccinated? ｜ New Corona Vaccine Q & A ｜ Ministry of Health, Labor and Welfare
https://www.cov19-vaccine.mhlw.go.jp/qa/0079.html