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.
Dehydration appears in 7,030 VAERS reports across all vaccines. Of these, 266 reports also mentioned death and 2,751 involved hospitalization. The severity rate (deaths + hospitalizations as a percentage of reports) is 42.9%. The top vaccines associated with this symptom are COVID19, HIBV, RV5. Remember: VAERS reports show temporal association, not causation.
Dehydration has been reported 7,030 times in VAERS from 1990 to 2026.
Of these reports, 266 were associated with death (3.78%) and 2,751 involved hospitalization.
The overall serious outcome rate (death or hospitalization) for reports mentioning Dehydration is 42.9%.
This data comes from the Vaccine Adverse Event Reporting System (VAERS), jointly managed by CDC and FDA.