⚠️
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.
Presyncope
6,390 total reports9.0% serious outcomes
Share
6,390
Total Reports
24
Deaths
550
Hospitalizations
9
Severity Rate
% serious outcomes
About Presyncope Reports
Presyncope has been reported 6,390 times in VAERS from 1990 to 2026.
Of these reports, 24 were associated with death (0.38%) and 550 involved hospitalization.
The overall serious outcome rate (death or hospitalization) for reports mentioning Presyncope is 9.0%.
Understanding Presyncope in VAERS
•Temporal association only: These reports show Presyncope 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 Presyncope. 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. COVID194,732
2. HPV4581
3. MNQ490
4. TDAP423
5. HPV9402
6. FLU3297
7. FLU4270
8. HEPA219
9. MENB146
10. VARZOS124
Detailed Breakdowns
Quick Facts
Reports:6,390
Deaths:24
Hospitalizations:550
Mortality Rate:0.38%
Severity Rate:9.0%
Related Analysis
Explore Further
Data Source
This data comes from the Vaccine Adverse Event Reporting System (VAERS), jointly managed by CDC and FDA.