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Vaccine Adverse Event Reporting System

Report an adverse event here:

VAERS was created in 1990. If you've had an adverse reaction to a vaccine, you can or your healthcare provider is required to report it to VAERS. The system was created to monitor, analyze and keep records of potential safety problems within the vaccine program.

"Although most common side effects of a vaccine are identified in studies before the vaccine is licensed, rare adverse events may not be detected in these studies. Therefore the U.S. vaccine safety system continuously monitors the adverse events (possible side effects) after a vaccine is licensed. "

-Ensuring The Safety of Vaccines in the US.

Ensuring the Safety of Vaccines in the United States

(click image for pdf)

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Electronic Support for Public Health–Vaccine Adverse Event Reporting System (ESP:VAERS)

Performing Organization: Harvard Pilgrim Health Care, Inc.

Project Officer: Steve Bernstein


National Vaccine Injury Compensation Program Monthly Statistics Report Updated 09/01/2020


Petitions Filed, Compensated and Dismissed, by Alleged Vaccine, Since the Beginning of VICP, 10/01/1988 through 09/01/2020


The primary objectives of VAERS are to:


  1. Detect new, unusual, or rare vaccine adverse events

  2. Monitor increases in known adverse events

  3. Identify potential patient risk factors for particular types of adverse events

  4. Assess the safety of newly licensed vaccines

  5. Determine and address possible reporting clusters (e.g., suspected localized [temporally or geographically] or product-/batch-/lot-specific adverse event reporting)

  6. Recognize persistent safe-use problems and administration errors

  7. Provide a national safety monitoring system that extends to the entire general population for response to public health emergencies, such as a large-scale pandemic influenza vaccination program. "

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