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Important: VAERS reports alone cannot determine if a vaccine caused an adverse event. Reports may contain incomplete, inaccurate, or unverified information. Correlation does not equal causation.
Myocarditis
5,540 total reports71.1% serious outcomes
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5,540
Total Reports
245
Deaths
3,694
Hospitalizations
71.1
Severity Rate
% serious outcomes
About Myocarditis Reports
Myocarditis has been reported 5,540 times in VAERS from 1990 to 2026.
Of these reports, 245 were associated with death (4.42%) and 3,694 involved hospitalization.
The overall serious outcome rate (death or hospitalization) for reports mentioning Myocarditis is 71.1%.
Understanding Myocarditis in VAERS
•Temporal association only: These reports show Myocarditis occurred after vaccination, not necessarily because of vaccination.
•Background rates matter: Many symptoms occur naturally at baseline rates in the population, unrelated to vaccination.
•Reporting variability: Medical terminology may be used differently by various healthcare providers and over time.
•Investigation needed: High-frequency reports may trigger further epidemiological studies to determine causation.
What This Data Shows
Most Associated Vaccines: The vaccines most frequently mentioned in reports with Myocarditis. This may reflect usage patterns, not causation.
Severity Patterns: The percentage of reports that involve serious outcomes can help prioritize safety investigations.
Reporting Trends: Changes in reporting frequency over time may reflect increased awareness, media attention, or actual safety signals.
Most Associated Vaccines
View all vaccines →Detailed Breakdowns
Quick Facts
Reports:5,540
Deaths:245
Hospitalizations:3,694
Mortality Rate:4.42%
Severity Rate:71.1%
Related Analysis
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Data Source
This data comes from the Vaccine Adverse Event Reporting System (VAERS), jointly managed by CDC and FDA.