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Wednesday, May 6, 2026

What we know about COVID vaccines and 'extremely rare' heart problems - Yahoo News

There has been no public announcement about what caused Damar Hamlin’s cardiac arrest after a tackle during a “Monday Night Football” game between the Cincinnati Bengals and the Buffalo Bills on Jan. 2 — but that hasn’t stopped people from speculating. One unfounded claim making the rounds on social media is that the 24-year-old’s medical emergency was caused by the COVID-19 vaccine. This assertion about Hamlin isn’t based on facts, and heart problems after vaccination have only been reported in a very small number of cases.

What we know about COVID vaccines and heart problems

Dr. Phillip Yang, a cardiologist at Stanford Health Care in California, told Yahoo News that heart problems following COVID vaccination are “theoretically possible but extremely rare.”

The Centers for Disease Control and Prevention has said it is monitoring reports of myocarditis, an inflammation of the heart muscle, and pericarditis, an inflammation of the outer lining of the heart, after receiving the Pfizer or the Moderna mRNA vaccine. Symptoms of myocarditis or pericarditis may include chest pain, shortness of breath or “feelings of having a fast-beating, fluttering, or pounding heart,” and cases after vaccination have most often been reported in adolescents and young adult males within a week of the second dose of the Pfizer or the Moderna vaccine. While the severity of myocarditis and pericarditis cases can vary, most patients with reported cases who received care “responded well to medicine...



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