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About The Vaccine Adverse Event Reporting System (VAERS)
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Note: Any use of these data implies consent to abide by the terms of the data use restrictions.

The Vaccine Adverse Event Reporting System (VAERS)

The Vaccine Adverse Event Reporting System (VAERS) database contains information on unverified reports of adverse events (illnesses, health problems and/or symptoms) following immunization with US-licensed vaccines. Reports are accepted from anyone and can be submitted electronically at

Search Current VAERS Data

The information in this database contains reports received from 1990 to the present. Data can be searched by the following: age, event category, gender, manufacturers, onset interval, recovery status, serious/non-serious category, state/territory, symptoms, vaccine, VAERS ID #, year reported, month reported, year vaccinated and month vaccinated. Click the VAERS Data Search button below to begin your data search.

Data Limitations and Cautions

A major limitation of VAERS data is that VAERS cannot determine if the adverse health event reported was caused by the vaccination. Information on additional limitations of the VAERS data is available at

Video: How to Access Data from CDC's VAERS WONDER System

This video demonstrates how to search VAERS data using CDC WONDER. You will also learn about the purpose of VAERS and strengths and limitations of VAERS data.

Watch specific sections of the video:

A written tutorial is also available to read or print.

* This allows you to search for details on a specific VAERS report by the VAERS ID number.

DISCLAIMER: VAERS staff at CDC and the Food and Drug Administration (FDA) follow up on all serious adverse event reports to obtain additional medical, laboratory, and/or autopsy records to help understand the circumstances. However, VAERS public data do not generally change based on the information obtained during the follow-up process. There are limitations to VAERS data. A report to VAERS does not mean that the vaccine caused the adverse event, only that the adverse event occurred sometime after vaccination. Read more about interpreting VAERS data: More information.
Click Dataset Documentation for complete information about this dataset.
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