National Vaccine
Information Center

Your Health. Your Family. Your Choice.

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Search the U.S. Government's VAERS Data

Access VAERS

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The search engine examines vaccines, symptoms, doses, demographics, and more. It produces tables, graphs, maps, and full case reports. Online help is also available.

MedAlerts now has VAERS 2.0 data.

You can also download the data to do custom analysis.

What is VAERS?

The U.S. Government collects reports of adverse health events that follow the administration of a vaccine. This database, called the Vaccine Adverse Event Reporting System (VAERS) is available for anyone to use.

Why this site?

MedAlerts offers an alternative to the official VAERS search engine, CDC Wonder. Both are built from the government's raw data, but MedAlerts has a better user interface, more powerful search capabilities, and more extensive reporting, making it the best VAERS search facility.

Reporting Vaccine Reactions

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If you suspect that you or your child has experienced a vaccine reaction, report that reaction to the government.

You can also report a reaction to the National Vaccine Information Center. NVIC has kept a vaccine adverse event database since 1982. To report a reaction to NVIC, click here.

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