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.
Incorrect product formulation administered appears in 9,496 VAERS reports across all vaccines. Of these, 8 reports also mentioned death and 7 involved hospitalization. The severity rate (deaths + hospitalizations as a percentage of reports) is 0.2%. The top vaccines associated with this symptom are COVID-19, COVID-19 (Bivalent), Meningococcal (MenACWY). Remember: VAERS reports show temporal association, not causation.
Incorrect product formulation administered has been reported 9,496 times in VAERS from 1990 to 2026.
Of these reports, 8 were associated with death (0.08%) and 7 involved hospitalization.
The overall serious outcome rate (death or hospitalization) for reports mentioning Incorrect product formulation administered is 0.2%.
This data comes from the Vaccine Adverse Event Reporting System (VAERS), jointly managed by CDC and FDA.