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.
1,109 adverse event reports (-44% vs 2019)
In 2020, 1,109 adverse event reports were filed for Influenza, Seasonal (Flucelvax Quadrivalent) in VAERS. This represents 12.5% of all 8,852 reports for this vaccine.
Of these reports, 1 mentioned death, 29 involved hospitalization, 155 required ER visits, and 18 reported disability.
Compared to the average of 860 reports per year for this vaccine, 2020 was above average (+29%).
In 2020, reporting for Influenza, Seasonal (Flucelvax Quadrivalent) was within typical ranges. As always, VAERS data reflects reports filed, not confirmed adverse events. Trends should be interpreted alongside vaccination volume and population health data.
This data comes from the Vaccine Adverse Event Reporting System (VAERS), jointly managed by CDC and FDA.