Millions of people around the world received mass vaccination against the COVID-19 virus, which helped to curb infections and reduce the number of severe cases and deaths.
However, as often happens over time, reports of rare side effects began to appear, including one that caught the attention of the medical community: myocarditis , an inflammation of the heart muscle.
Myocarditis is a condition in which the heart tissue becomes inflamed, which can impair its ability to pump blood efficiently. In most cases, it is mild and resolves with medical treatment, although some patients may require hospital observation.
According to scientific studies that have been carried out on this, this adverse effect appears more frequently in young men, especially those under 30 years of age, and usually manifests itself a few days after receiving the second dose of a messenger RNA (mRNA) vaccine , such as those from Pfizer-BioNTech or Moderna.
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