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29 Percent of Young Pfizer COVID Vaccine Recipients Suffered Heart Effects: Study

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Nearly three in 10 children who received Pfizer’s COVID-19 vaccine experienced heart effects afterwards, according to a new study.

Researchers studied 301 students across two schools in Thailand. The students were aged 13 to 18 and had received a dose of Pfizer’s vaccine without a serious adverse event. Most had no underlying disease, while 44 had conditions such as asthma and allergic rhinitis.

Researchers conducted laboratory tests to establish a baseline and followed up at three days, seven days, and 14 days after the students received a second dose of the vaccine.

Researchers found that 29 percent of the youth experienced cardiovascular effects, including heart palpitations, chest pain, and shortness of breath. Fifty-four had abnormal electrocardiogram results. Six experienced mitral valve prolapse, which the Mayo Clinic describes as a heart valve disease; six had high blood pressure, and seven were diagnosed with heart inflammation.

Two of the children were hospitalized, with one being admitted to intensive care.

Limitations of the study, published ahead of peer review and funded by Mahidol University, included requiring parental permission for blood testing, which could have impacted participation.

Nearly 100 percent of the vaccine recipients recovered within two weeks, researchers said. Still, due to the detection of heart effects, young people receiving any of the vaccines based on messenger RNA technology—both the Pfizer and Moderna vaccines are—”should be monitored for side effects,” the authors said.

Pfizer did not respond to a request for comment.

Reaction

Several cardiologists, after reviewing the new paper, said it adds to the body of evidence that the risks of the vaccines may outweigh the benefits, especially for young people.

“Any form of heart damage in young persons is concerning since the long-term risks of heart failure and sudden death with exercise are unknown,” Dr. Peter McCullough, the chief medical adviser for the Truth for Health Foundation, told The Epoch Times in an email.

“This is one of ~200 published papers demonstrating the risks of COVID-19 vaccination far outweigh any theoretical benefit,” he added.

U.S. authorities have acknowledged a link between the Pfizer and Moderna vaccines and heart inflammation, but maintain that the benefits of the shots outweigh the risks for all age groups beyond six months old. According to reports to the U.S. Vaccine Adverse Event Reporting System through May 26, males aged 5 to 49, and females aged 12 to 29, had higher-than-background rates of myocarditis following a second Pfizer dose. The highest rate was 76 per million within seven days of a second dose among males 16 or 17 years old.

Dr. Anish Koka, a cardiologist in Philadelphia, said the new study results “are not reassuring.”

While the study authors said most patients recovered, some of the conditions they experienced are far from mild, Koka wrote in a blog post.

“The Thai study helps fill in some of the data void so parents and their doctors can be better informed when discussing the risks and benefits of the vaccines,” he said.

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