Have you had a reaction following a vaccination? Contact your healthcare provider. Report an Adverse Event using the VAERS online form or the downloadable PDF. New!

On May 8, 2025, CDC and FDA expanded public access to VAERS data in the WONDER database (wonder.cdc.gov) and in VAERS downloadable files (vaers.hhs.gov) to provide a more information …

Background and Public Health Importance Established in 1990, the Vaccine Adverse Event Reporting System (VAERS) is a national early warning system to detect possible safety problems in U.S. …

The Vaccine Adverse Event Reporting System (VAERS) is a national early warning system to detect possible safety problems in vaccines used in the United States. VAERS accepts and analyzes …

Nov 28, 2025 · VAERS data CSV and compressed (ZIP) files are available for download in the table below. For information about VAERS data, please view the VAERS Data Use Guide [PDF - 310KB], …

On May 8, 2025, CDC and FDA expanded public access to VAERS data in the WONDER database (wonder.cdc.gov) and in VAERS downloadable files (vaers.hhs.gov) to provide a more complete …

Jan 8, 2024 · Events described in manufacturer’s package insert as contraindications to additional doses of vaccine (interval - see package insert) Effective date: January 8, 2024. The Reportable …

Other Resources VAERS: A national vaccine safety surveillance program run by CDC and the Food and Drug Administration (FDA). CISA: CDC’s Clinical Immunization Safety Assessment (CISA) Project …

A one-time-use, case sensitive key sent via e-mail is required in order to access the tool. Individuals assisting us in our follow-up efforts may also receive a key by VAERS staff. The tool uses the key as …

**Represents the onset interval between vaccination and the adverse event. For a detailed explanation of terms, see the Vaccine Injury Table at