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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.
Anaphylactic reaction
5,781 total reports18.2% serious outcomes
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5,781
Total Reports
89
Deaths
965
Hospitalizations
18.2
Severity Rate
% serious outcomes
About Anaphylactic reaction Reports
Anaphylactic reaction has been reported 5,781 times in VAERS from 1990 to 2026.
Of these reports, 89 were associated with death (1.54%) and 965 involved hospitalization.
The overall serious outcome rate (death or hospitalization) for reports mentioning Anaphylactic reaction is 18.2%.
Understanding Anaphylactic reaction in VAERS
•Temporal association only: These reports show Anaphylactic reaction 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 Anaphylactic reaction. 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. COVID195,048
2. FLU3515
3. MMR452
4. DTAP396
5. IPV363
6. FLUX356
7. VARCEL304
8. FLU4266
9. TDAP258
10. HIBV206
Quick Facts
Reports:5,781
Deaths:89
Hospitalizations:965
Mortality Rate:1.54%
Severity Rate:18.2%
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.