08/12/2023 Dr. Peter McCullough: Vaccine-induced myocarditis is more severe than which occurs with natural infection. The troponin, the blood test for heart injury with the vaccine myocarditis, is 10 to 100 folds higher than the troponin we see with the natural infection. Pediatric cases of vaccine-induced myocarditis often necessitate hospitalization, presenting with dramatic EKG changes, chest pain, and early heart failure.