Immunization (Vaccines)

Immunization is widely recognized as one of the greatest public health achievements of the twentieth century. Vaccines save lives, prevent the spread of diseases and reduce health care costs. Immunization programs are an important foundation of Ontario’s health system. We provide expertise in immunization and vaccine-preventable disease control.

For information specific to COVID-19, please visit the COVID-19 Vaccine webpage.

Sub Topics

Influenza Vaccine Effectiveness Program

Part of the Sentinel Practitioner Surveillance Network, this program monitors influenza vaccine effectiveness annually.

Immunization Coverage

Learn more about PHO’s efforts in provincial surveillance of immunization coverage, including the annual coverage assessment of Ontario’s publicly-funded immunization programs.

Vaccine Safety

Resources, information and links related to vaccine safety, including surveillance and prevention of unwanted or unexpected health effects following vaccination.