Reporting Adverse Events

Why Adverse Events Should Be Reported

The Vaccine Adverse Event Reporting System (VAERS) is an early warning system that helps CDC and the Food and Drug Administration (FDA) monitor problems following vaccination. Because it is a passive surveillance system, VAERS relies on receiving reports from healthcare providers in the event that there are any health problems occur after vaccination.

What to Report

Healthcare providers are required by law to report to VAERS:

Healthcare providers are encouraged to report:

  • Any adverse event that occurs after the administration of a vaccine licensed in the United States, whether or not it is clear that a vaccine caused the adverse event
  • Vaccine administration errors

Online reporting is strongly encouraged. Please report clinically important adverse events that occur after vaccination of adults and children, even if you are not sure whether the vaccine caused the adverse event.

VAERS accepts all reports, including reports of vaccination errors. Guidance on reporting vaccination errorsexternal icon is available if you have additional questions.

How to Report an Adverse Event

Doctor entering information online.

There are 2 ways to submit a report to VAERS:

Option 1: Submit a VAERS Report onlineexternal icon (Preferred)
The online VAERS Report must be completed and submitted in the same session; it cannot be saved and edited at a later time.
Note: sessions time out after 20 minutes of inactivity; no information is saved.

Option 2: Download a Writable PDF Form and upload when readyexternal icon
The Writable PDF Form can be downloaded and completed electronically on your own time. When ready, return to the VAERS Writable PDF web page (use link above) and follow Step 2 instructions to upload the form.

More information on reporting an adverse event to VAERSexternal icon. If you need further assistance, please email or call 1-800-822-7967.

More Information