- Among the 445 reports of myocarditis/pericarditis following Pfizer-BioNTech Comirnaty COVID-19 vaccine (administered to those 12 years of age and older):
- Symptoms started between 5 minutes and 94 days after vaccination
- Among the 306 reports of myocarditis following vaccination with a Moderna Spikevax COVID-19 vaccine (administered to those 12 years of age and older):
- Symptoms started between 14 minutes and 69 days after vaccination