Vaccine Safety
Vaccine safety surveillance is essential to the success of immunization programs.
PHO leads the provincial surveillance of adverse events following immunization (AEFIs). 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 AEFIs to their local public health unit. Public health units investigate AEFIs and provide support to immunizers, individuals, and their families.
If you experience an adverse event after immunization, please contact your health care provider or your local public health unit.
To request a copy of a historical vaccine safety report (available for the years 2012–2019), please contact Communicable.DiseaseControl@oahpp.ca.
Public Health Ontario is a member of Vaccine Safety Net – a global network of websites, evaluated by the World Health Organization, that provides reliable information on vaccine safety.
How to Report an AEFI
- Complete an AEFI Reporting Form
- Send it to your local public health unit
See our AEFI Reporting Fact Sheet for healthcare providers for more information.
Having trouble opening PDF forms? Download and save the form directly onto your device.
Immunization Data Tool
Use this resource to explore and download Ontario’s immunization program surveillance data. This resource includes Ontario’s immunization coverage and exemption estimates for routine childhood and school-based immunizations, COVID-19 coverage estimates, and vaccine safety surveillance data collected from reports of Adverse Events Following Immunization (AEFI).
PHO Rounds: An Overview of Youth Wellness Hubs Ontario: Measurement-Based Care, Data Snapshots, and Integrated Supports for Indigenous Youth
This PHO Rounds will provide a comprehensive overview of YWHO, describe the co-design of this model with youth (including Indigenous youth), and share learnings on the implementation of MBC including a current data snapshot. The session will share experiences and lessons learned on how the YWHO model is being used and adapted to support Indigenous youth and their families.
To obtain or inquire about an immunization record, or for general immunization information, please contact your local public health unit.
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