Widespread cardiac issues were reported for Covid before vaccines came out. Article from Sep 2020 for example. https://www.science.org/content/article/evidenc

Widespread cardiac issues were reported for Covid before vaccines came out. Article from Sep 2020 for example. https://www.science.org/content/article/evidence-builds-covid-19-can-damage-heart-doctors-are-racing-understand-it https://www.science.org/content/article/evidence-builds-covi... And there's a bunch of similar articles from March and April 2020.