On July 9, local time, the World Health Organization (WHO) issued a statement on the report of cases of cardiac inflammation caused by myocarditis and pericarditis after vaccination with Pfizer and Modena’s new crown vaccine. The benefits still outweigh the risks.Myocarditis is inflammation of the heart muscle, and pericarditis is inflammation of the fibrous sac around the heart. The New Crown Subcommittee (GACVS) of the WHO Global Advisory Committee on Vaccine Safety said in a statement that although it may cause serious illness, the cases are usually mild and respond well to “conservative treatment”.
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On the same day, the European Medicines Agency also issued a statement stating that there is a link between heart inflammation and vaccination with Pfizer and Modena’s new crown vaccine. In view of this, it is recommended to add two symptoms of myocarditis and pericarditis in the side effect information of vaccine products, and to warn medical staff and those who are preparing to be vaccinated.
There is a causal relationship between the two parties
According to the WHO statement, according to data from the U.S. Vaccine Adverse Event Reporting System, as of June 11, 2021, among the 12-29 year-olds receiving the new crown messenger ribonucleic acid vaccine, about every million men received the second dose 40.6 cases of myocarditis occurred, and there were about 4.2 cases of myocarditis per million women in the second dose.
For people over 30, the reporting rates for men and women are 2.4 and 1.0 per million, respectively.
GACVS stated: “These cases occur more frequently in young men and after the second dose of vaccination, usually within a few days after vaccination. Current evidence suggests that there may be a causal relationship between myocarditis and the new crown messenger RNA vaccine. “.
GACVS also stated that the Pharmacovigilance Risk Assessment Committee of the European Medicines Agency has recently confirmed this seemingly reasonable causality.
Previously, the U.S. Food and Drug Administration (FDA) revised the Pfizer and Modena new crown vaccine instructions on June 25, warning of the risk of myocarditis and pericarditis (inflammation of the tissue around the heart) after the above two new crown vaccines. increase.
According to experts, more rigorous studies and more robust research designs using alternative data sources are underway, and as more data becomes available, GACVS will continue to review this situation.
Seek medical attention immediately if symptoms are found
According to WHO experts, if vaccinated people experience symptoms of myocarditis or pericarditis, such as new chest pain, or pain, shortness of breath or heart palpitations that cannot go away after vaccination, they should be instructed to seek medical attention immediately.
The WHO pointed out that clinicians should also be aware of the risks of mRNA vaccines causing myocarditis and pericarditis, as well as those who are most likely to be affected. They should be alert to any acute chest pain, shortness of breath and heart palpitations that may indicate myocarditis after vaccination, especially in adolescents or young men. In young people, coronary events are unlikely to be the source of this symptom.
The WHO pointed out that “when possible, suspected cases should be evaluated, guidance provided, and follow-up conducted through consultation with cardiologists”. In addition, it is also important to rule out other potential causes of disease, including new coronavirus infections and other causes caused by viral infections.
While acknowledging that mRNA vaccines have obvious benefits in reducing deaths and hospitalizations due to new crown infections, GACVS encourages all health professionals to report all events of myocarditis and other adverse events observed with these vaccines and other vaccines.
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