Reporting Adverse Events
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.
Healthcare providers are required by law to report to VAERS:
- Any adverse event listed in the VAERS Table of Reportable Events Following Vaccination pdf icon[PDF – 5 pages]external icon that occurs within the specified time period after vaccination
- Any adverse event listed by the vaccine manufacturer as a contraindication to further doses of the vaccine
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.
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.
- Vaccine Adverse Event Reporting System (VAERS) - HHSexternal iconLearn more about the national monitoring system that serves as an early warning system to detect possible vaccine safety issues.
- Information for Healthcare Providers - VAERSexternal iconHealthcare providers can find guidance on what adverse events to report and answers to common questions about VAERS.
- Safety Information by VaccineGet the latest safety information from CDC on recommended U.S. vaccines.
- VAERS Print and Web MaterialSearch through education materials, including factsheets, brochures, graphics and web banners for healthcare professionals and the general public.