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.
745 adverse event reports (+213% vs 2016)
In 2017, 745 adverse event reports were filed for Influenza, Seasonal (Flucelvax Quadrivalent) in VAERS. This represents 8.4% of all 8,852 reports for this vaccine.
Of these reports, 0 mentioned death, 15 involved hospitalization, 123 required ER visits, and 9 reported disability.
Compared to the average of 860 reports per year for this vaccine, 2017 was below average (-13%).
Year-over-year change: The large change from 2016 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.