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.
Febrile convulsion appears in 4,442 VAERS reports across all vaccines. Of these, 27 reports also mentioned death and 1,141 involved hospitalization. The severity rate (deaths + hospitalizations as a percentage of reports) is 26.3%. The top vaccines associated with this symptom are MMR, Hib, Chickenpox (Varivax). Remember: VAERS reports show temporal association, not causation.
Febrile convulsion has been reported 4,442 times in VAERS from 1990 to 2026.
Of these reports, 27 were associated with death (0.61%) and 1,141 involved hospitalization.
The overall serious outcome rate (death or hospitalization) for reports mentioning Febrile convulsion is 26.3%.
This data comes from the Vaccine Adverse Event Reporting System (VAERS), jointly managed by CDC and FDA.