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.
Loss of consciousness appears in 25,416 VAERS reports across all vaccines. Of these, 356 reports also mentioned death and 2,460 involved hospitalization. The severity rate (deaths + hospitalizations as a percentage of reports) is 11.1%. The top vaccines associated with this symptom are COVID19, HPV4, MNQ. Remember: VAERS reports show temporal association, not causation.
Loss of consciousness has been reported 25,416 times in VAERS from 1990 to 2026.
Of these reports, 356 were associated with death (1.40%) and 2,460 involved hospitalization.
The overall serious outcome rate (death or hospitalization) for reports mentioning Loss of consciousness is 11.1%.
This data comes from the Vaccine Adverse Event Reporting System (VAERS), jointly managed by CDC and FDA.