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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.
Seizure
10,676 total reports27.5% serious outcomes
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10,676
Total Reports
359
Deaths
2,575
Hospitalizations
27.5
Severity Rate
% serious outcomes
About Seizure Reports
Seizure has been reported 10,676 times in VAERS from 1990 to 2026.
Of these reports, 359 were associated with death (3.36%) and 2,575 involved hospitalization.
The overall serious outcome rate (death or hospitalization) for reports mentioning Seizure is 27.5%.
Understanding Seizure in VAERS
•Temporal association only: These reports show Seizure 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 Seizure. 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
1. COVID198,643
2. PNC13681
3. HPV9649
4. FLU4584
5. MNQ544
6. HEPA537
7. MMR467
8. TDAP433
9. HIBV420
10. HPV4419
Detailed Breakdowns
Quick Facts
Reports:10,676
Deaths:359
Hospitalizations:2,575
Mortality Rate:3.36%
Severity Rate:27.5%
Related Analysis
Explore Further
Data Source
This data comes from the Vaccine Adverse Event Reporting System (VAERS), jointly managed by CDC and FDA.