Vaccine safety

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Vaccines are safe. They are among the safest tools of modern medicine. Vaccines are held to the highest safety standards because they are given to healthy people, including children.
Vaccines undergo extensive testing and must be proven to be safe and effective before they are approved for use. The approval process for vaccines is more stringent than most drugs available in Canada. After a vaccine is approved for use, its safety is continuously monitored. 

In this section, you will find trustworthy, science-based information about the safety of vaccines, including information on:

  • Vaccine side effects.
  • Vaccine ingredients.
  • How vaccines are tested, approved, and monitored.
  • How Canada's vaccine safety system ensures vaccines are as safe as possible. 

Browse our frequently asked questions on Vaccine Safety.



Date last reviewed: 
Monday, May 16, 2022