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Public Health Ontario > Home > Browse By Topic > Infectious Diseases > Annual Report on Vaccine Safety in Ontario, 2012
Annual Report on Vaccine Safety in Ontario, 2012

The Annual Report on Vaccine Safety in Ontario, 2012, is the first comprehensive annual assessment of vaccine safety in Ontario. It includes:

  • A summary of adverse events following immunization (AEFIs) reported in Ontario after vaccines that were given in 2012
  • A description of the provincial AEFI surveillance system
  • Recommendations for improving vaccine safety surveillance in Ontario.

Adverse events are rare: of the approximately 7.8 million doses of publicly funded vaccines distributed in Ontario in 2012, only 631 adverse events were reported. Of those 631 adverse events, 56 were serious.

In Canada, vaccines are highly regulated by Health Canada and monitored by governments and manufacturers to ensure they are as safe as possible. Part of that monitoring occurs when adverse reactions are reported by Ontario health professionals, patients, or their parents to public health units, who in turn report this information to Public Health Ontario. This data is used to monitor the incidence of adverse reactions and continuously evaluate and improve vaccine safety.


​Download report

More from this report
 How to report an AEFI
More from this report How to report an AEFI
  1. Immunizer overview: highlights key findings from the report, key messages on vaccine safety, and additional resources and references

AEFI reporting is an essential part of vaccine safety. Immunizers are required to report AEFIs to their local Medical Officer of Health. To help improve AEFI reporting, please refer to the following PHO resources:


Uncontrolled print copy. Valid only on day of Print: [date]
Page updated on [date/time] 25/06/2014 2:44 PM
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