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To obtain or inquire about an immunization record, or for public immunization information, please contact your local public health unit

For scientific and technical inquiries, please contact

Immunization is widely recognized as one of the greatest public health achievements of the twentieth century. Vaccines prevent diseases, save lives and reduce health care costs. Immunization programs are an important foundation of Ontario’s health system.

We are internationally recognized experts in immunization and vaccine preventable disease prevention and control. To protect the health of Ontarians, we provide technical expertise and resources to guide public health practice, and conduct impactful, responsive research and evaluation.

Vaccine-Preventable Diseases


Disease information, resources, research, laboratory testing information, and related links for vaccine-preventable diseases.



Vaccine Safety


We lead the surveillance and evaluation of adverse events following immunization (AEFIs) in Ontario and provide resources and support for immunization stakeholders to understand and communicate about vaccine safety.

Applied Immunization Research and Evaluation


Our immunization research and evaluation delivers innovative, interdisciplinary, responsive and impactful evidence to help guide and strengthen immunization programs. We also conduct training and education to build capacity.

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Immunization Coverage


High immunization coverage is essential for the effective prevention and control of vaccine-preventable diseases. PHO monitors vaccine coverage among students across Ontario’s publicly-funded immunization programs.

Provincial Infectious Diseases Advisory Committee


The Provincial Infectious Disease Advisory Committee on Immunization (PIDAC-I) applies the best available evidence to provide recommendations on vaccine-related issues and vaccine program delivery.

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See a listing of all resources related to Immunization

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Page last updated: 2017-11-16 3:47 PM
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Page updated on [date/time] 2017-11-16 3:47 PM
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