Recent research carried out on millions of people vaccinated against Covid-19 suggests a potential risk of cardiovascular complications induced by second doses of Moderna and Pfizer vaccines in young people aged 18-25. However, the risks remain very low.
- A large study carried out on more than 15 million people vaccinated against Covid highlights an increased risk of cardiac complications
- However, the incidence rate remains low and research continues to encourage vaccination against Covid-19.
This is a study that caused a lot of noise when it was published. Featured in The Lancetthe research was conducted with 15,148,369 people aged 18-64, vaccinated between December 18, 2020 and December 25, 2021 (BioNTech-Pfizer and/or Moderna).
Among the patient profiles studied, 411 cases of myocarditis (inflammation of the heart muscle) or pericarditis (inflammation of the membrane that envelops the heart) were detected. In men aged 18 to 25, the incidence rate was higher after the second dose.
“One in 36,857 risk”
Nothing to be overly alarmed about, according to the authors of the study, since this represents “one in 36,857 risk“to contract myocarditis or pericarditis after having received a dose of anti-Covid vaccine. “The study results, along with the benefit-risk balance, continue to support vaccination with either of the two messenger RNA vaccines.“, concludes the study.
This extensive research was carried out in response to several reports of increased risks of myocarditis or pericarditis (or both) linked to messenger RNA vaccines to combat Covid-19, particularly in young men.
Risks already pointed out by previous studies
However, this is not the first time that messenger RNA vaccines have been suspected of having side effects on heart health. In November 2021, a scientific interest group in epidemiology created by Health Insurance (Cnam) and the National Medicines Safety Agency (ANSM), confirmed the existence of risks of myocarditis and pericarditis after the injection. messenger RNA vaccines.
According to the survey, this risk would be even higher after the second dose of Moderna. Results that prompted the High Authority for Health to advise against this vaccine for people under the age of thirty.
