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.
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