Study Finds Signs of Heart Injury in Vaccinated People Without Chest Pain

The study results ’suggest that mild asymptomatic myocardial inflammation could be more common than we ever expected,' one doctor said.

A person receives a COVID-19 vaccine in Tokyo on Jan. 31, 2022. Eugene Hoshiko/Pool/AFP via Getty Images

People who received a COVID-19 vaccine had higher levels of a glucose analogue than unvaccinated people, suggesting heart inflammation, according to a new study.

Researchers in Japan compared 700 vaccinated people with 303 unvaccinated people. None experienced cardiac symptoms.