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Which diseases do immunizations protect against?

Which Diseases Do Vaccines Protect Against?1

The Canadian publicly funded health care system offers protection against 13 vaccine-preventable diseases, TB protection in certain areas and HPV vaccine for older children.


Diphtheria is a serious disease (especially for infants) caused by bacteria that infects the nose, throat, or skin.

Diphtheria causes a thick coating to develop at the back of the throat, which can make it difficult to breathe. Diphtheria can also cause heart and nervous system damage and may result in paralysis, or even death.

Diphtheria is extremely contagious. It can be spread through coughing, sneezing, and touching (e.g., when children share toys and utensils).

  1. Public Health Agency of Canada. Vaccine-preventable diseases.
    Accessed March 17, 2016.
  2. Public Health Agency of Canada. Diphtheria. Accessed
    March 17, 2016.