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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
7,030 total reports42.9% serious outcomes
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7,030
Total Reports
266
Deaths
2,751
Hospitalizations
42.9
Severity Rate
% serious outcomes
About Dehydration Reports
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%.
Understanding Dehydration in VAERS
•Temporal association only: These reports show Dehydration occurred after vaccination, not necessarily because of vaccination.
•Background rates matter: Many symptoms occur naturally at baseline rates in the population, unrelated to vaccination.
•Reporting variability: Medical terminology may be used differently by various healthcare providers and over time.
•Investigation needed: High-frequency reports may trigger further epidemiological studies to determine causation.
What This Data Shows
Most Associated Vaccines: The vaccines most frequently mentioned in reports with Dehydration. This may reflect usage patterns, not causation.
Severity Patterns: The percentage of reports that involve serious outcomes can help prioritize safety investigations.
Reporting Trends: Changes in reporting frequency over time may reflect increased awareness, media attention, or actual safety signals.
Most Associated Vaccines
1. COVID194,560
2. HIBV758
3. RV5605
4. DTAP549
5. HEP532
6. PNC513
7. IPV460
8. FLU3450
9. MMR444
10. VARCEL334
Detailed Breakdowns
Quick Facts
Reports:7,030
Deaths:266
Hospitalizations:2,751
Mortality Rate:3.78%
Severity Rate:42.9%
Related Analysis
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Data Source
This data comes from the Vaccine Adverse Event Reporting System (VAERS), jointly managed by CDC and FDA.