Prototype only — this site uses synthetic data and is not connected to the real VAERS or CDC systems.

VAERSVaccine Adverse Event Reporting System

Data downloads

De-identified report data, one file per calendar year. The files generated here are small synthetic samples for demonstration — they are not real VAERS data.

Annual data files

Annual de-identified data files available for download
YearReportsFile sizeLast updatedDownload
202641,88218.4 MB2026-08-01
202568,24031.2 MB2026-01-15
202471,10533.0 MB2025-01-14
202379,61236.8 MB2024-01-12
202294,33144.1 MB2023-01-13

Data dictionary

Field names and descriptions
FieldDescription
VAERS_IDUnique report identifier
RECVDATEDate the report was received
STATETwo-letter state of residence
AGE_YRSAge in years at vaccination
SEXF, M or U
SYMPTOM_TEXTDe-identified narrative description
VAX_TYPEVaccine type code
VAX_MANUManufacturer
VAX_LOTLot number as reported
VAX_DOSE_SERIESDose number in the series
HOSPITALY or N — hospitalization reported
ADMIN_ERRORY or N — administration error reported