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.
Vaccination failure appears in 15,849 VAERS reports across all vaccines. Of these, 205 reports also mentioned death and 796 involved hospitalization. The severity rate (deaths + hospitalizations as a percentage of reports) is 6.3%. The top vaccines associated with this symptom are COVID-19, Shingles (Zostavax), Flu (Seasonal). Remember: VAERS reports show temporal association, not causation.
Vaccination failure has been reported 15,849 times in VAERS from 1990 to 2026.
Of these reports, 205 were associated with death (1.29%) and 796 involved hospitalization.
The overall serious outcome rate (death or hospitalization) for reports mentioning Vaccination failure is 6.3%.
This data comes from the Vaccine Adverse Event Reporting System (VAERS), jointly managed by CDC and FDA.