Most often, these problems are diagnosed in men.
The US federal regulator has added a warning to the description of COVID-19 vaccines produced by Pfizer/BioNTech and Moderna. In rare cases after vaccination, the risk of inflammation of the heart muscle increases.
According to the Food and Drug Administration (FDA), there are reports that after vaccinations with these vaccines – especially after the second dose – the risks of myocarditis and pericarditis increase. These side effects are much more common in men; symptoms appear a few days after vaccination.
As of June 11, more than 1.2 thousand cases of myocarditis and pericarditis were diagnosed in the United States – by this time, about 300 million doses of vaccines were administered.
In total, 309 people under the age of 30 were hospitalized with inflammation of the heart muscle, 295 of them were discharged. Pfizer and Moderna have not yet commented on the situation.