Subclinical Heart Damage More Prevalent Than Thought After Moderna Vaccination: Study

A Swiss soldier fills up a syringe with Moderna Covid-19 vaccine in Delemont, northern Switzerland, on December 14, 2021. - Switzerland hit by a new wave of infections, like much of Europe, has called army in to speed up vaccination. (Photo by Fabrice COFFRINI / AFP) Photo by FABRICE COFFRINI/AFP via Getty Images

Damage to the heart is more common than thought after receipt of Moderna’s COVID-19 booster, a new study indicates.

One in 35 health care workers at a Swiss hospital had signs of heart injury associated with the vaccine, mRNA-1273, researchers found.