⚠️
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.
Influenza
9,245 total reports11.4% serious outcomes
Share
9,245
Total Reports
167
Deaths
889
Hospitalizations
11.4
Severity Rate
% serious outcomes
About Influenza Reports
Influenza has been reported 9,245 times in VAERS from 1990 to 2026.
Of these reports, 167 were associated with death (1.81%) and 889 involved hospitalization.
The overall serious outcome rate (death or hospitalization) for reports mentioning Influenza is 11.4%.
Understanding Influenza in VAERS
•Temporal association only: These reports show Influenza 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 Influenza. 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. COVID192,614
2. FLUX2,444
3. FLU31,240
4. HEP1,132
5. VARZOS511
6. FLU4327
7. PPV314
8. MMR302
9. FLUN3221
10. TD196
Detailed Breakdowns
Quick Facts
Reports:9,245
Deaths:167
Hospitalizations:889
Mortality Rate:1.81%
Severity Rate:11.4%
Related Analysis
Explore Further
Data Source
This data comes from the Vaccine Adverse Event Reporting System (VAERS), jointly managed by CDC and FDA.