Skip Ribbon Commands
Skip to main content
Vaccine Safety
For health professionals

How to report an AEFI:

1. Complete an AEFI reporting form
2. Send it to your local public health unit
See our AEFI reporting fact sheet for more information.



Public Health Ontario analyzes adverse events following immunization (AEFI) that are reported in Ontario to monitor the safety of administered vaccines and contribute to national and international vaccine safety surveillance systems. An AEFI is an unwanted or unexpected health effect that happens after someone receives a vaccine, which may or may not be caused by the vaccine. 

In Ontario, health professionals are required to report adverse events following immunization (AEFIs) to their local public health unit. Public health units investigate adverse events and provide support to immunizers, individuals and their families.  If you have an AEFI, contact your health care provider.​  

For public health units
Photo of children holding hands Photo of woman on the phone Photo of man presenting


The Annual Report on Vaccine Safety in Ontario, 2015 is a comprehensive annual provincial assessment of vaccine safety, and includes a summary of adverse events following immunization (AEFI) reported in Ontario in 2015.





Surveillance forms

Guidance documents

Training resources

To access a recording of our iPHIS training webinar, please contact

Vaccine Safety Surveillance Workshop, 2013

Related Links
Contact us
Immunization & Vaccine Preventable Diseases:

If you are a health care provider or member of the public with questions about vaccine safety or AEFI reporting, please contact your local public health unit.

Uncontrolled print copy. Valid only on day of Print: [date]
Page updated on [date/time] 28/11/2016 9:27 AM
© , Ontario Agency for Health Protection and Promotion