# CDC Study
- SARS-CoV2 infection based on presence in hospital for any code
- Vaccine-induced myocarditis based on specifically recorded incidence

# Nordic study
- Larger pool of data
- SARS-CoV2 infection based on hospitalization for SARS-CoV2 infection
- Myocarditis incidence rate far lower than what was reported by CDC
- Still impossible to gauge the real rates of cardiac/pericardiac events