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.
4,814 adverse event reports
In 2009, 4,814 adverse event reports were filed for FLU(H1N1) in VAERS.
Of these reports, 28 mentioned death, 310 involved hospitalization, 1,741 required ER visits, and 16 reported disability.
Compared to the average of 2,908 reports per year for this vaccine, 2009 was above average (+66%).
In 2009, reporting for FLU(H1N1) 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.