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.
1,264 adverse event reports (+223% vs 2013)
In 2014, 1,264 adverse event reports were filed for Influenza, Seasonal (Flulaval Quadrivalent) in VAERS. This represents 2.4% of all 52,111 reports for this vaccine.
Of these reports, 6 mentioned death, 55 involved hospitalization, 428 required ER visits, and 16 reported disability.
Compared to the average of 3,877 reports per year for this vaccine, 2014 was below average (-67%).
Year-over-year change: The large change from 2013 likely reflects a ramp-up in vaccination (e.g., new vaccine rollout or expanded eligibility) rather than a change in per-dose risk.
This data comes from the Vaccine Adverse Event Reporting System (VAERS), jointly managed by CDC and FDA.