The Pfizer and ModernaCovid-19 vaccines are linked to heart inflammation on rare occasions, British health regulators have said, and doctors and patients are cautioned to be alert for symptoms.
The punctures have triggered myocarditis and pericarditis, which can lead to chest pain and shortness of breath, according to a bulletin issued Friday night by the Medicines and Healthcare Products Regulatory Agency (MHRA). The risk is higher in younger men and after the second dose, he said.
Myocarditis is inflammation of the heart muscle and pericarditis is inflammation of the outer lining of the heart. In both cases, the body’s immune system causes inflammation in response to an infection or some other trigger.
Doctors have made 87 reports of the illnesses as a side effect of the Pfizer / BioNTech vaccine, and four in recipients of the Moderna vaccine, as of June 16.
Those cases were of a total of 16.8 million first doses and 10.9 million second doses of Pfizer / BioNTech and 730 thousand doses of Moderna administered on the same date.
“These are typically mild cases and people tend to recover quickly after standard treatment and rest,” the MHRA said.
“Healthcare professionals should be aware of the signs and symptoms of myocarditis and pericarditis. Vaccinated people should also seek immediate medical attention if they experience new chest pain, shortness of breath, palpitations or arrhythmias, ”he added.
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“While there have also been reports of myocarditis and pericarditis after vaccination with AstraZeneca, there is insufficient evidence to recommend similar warnings.”
US regulators have issued a similar alert to doctors.
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