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.
Memory impairment appears in 3,825 VAERS reports across all vaccines. Of these, 52 reports also mentioned death and 807 involved hospitalization. The severity rate (deaths + hospitalizations as a percentage of reports) is 22.5%. The top vaccines associated with this symptom are COVID19, HPV4, ANTH. Remember: VAERS reports show temporal association, not causation.
Memory impairment has been reported 3,825 times in VAERS from 1990 to 2026.
Of these reports, 52 were associated with death (1.36%) and 807 involved hospitalization.
The overall serious outcome rate (death or hospitalization) for reports mentioning Memory impairment is 22.5%.
This data comes from the Vaccine Adverse Event Reporting System (VAERS), jointly managed by CDC and FDA.