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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.
Convulsion
14,104 total reports39.2% serious outcomes
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14,104
Total Reports
257
Deaths
5,268
Hospitalizations
39.2
Severity Rate
% serious outcomes
About Convulsion Reports
Convulsion has been reported 14,104 times in VAERS from 1990 to 2026.
Of these reports, 257 were associated with death (1.82%) and 5,268 involved hospitalization.
The overall serious outcome rate (death or hospitalization) for reports mentioning Convulsion is 39.2%.
Understanding Convulsion in VAERS
•Temporal association only: These reports show Convulsion 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 Convulsion. 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. HIBV5,035
2. DTAP4,183
3. MMR4,060
4. OPV3,376
5. DTP3,276
6. PNC3,114
7. IPV3,005
8. HEP2,583
9. HPV42,473
10. VARCEL1,696
Detailed Breakdowns
Quick Facts
Reports:14,104
Deaths:257
Hospitalizations:5,268
Mortality Rate:1.82%
Severity Rate:39.2%
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.