Some children who experienced heart inflammation after COVID-19 vaccination had scarring on their hearts months later, a new long-term study found.
Researchers followed a group of 40 patients aged 12 to 18 for up to one year after the children were diagnosed with myocarditis, or heart inflammation, following vaccination with one of the messenger RNA vaccines from Pfizer or Moderna. They performed a series of tests, including echocardiograms.
