Evidence vaccines work

How can you be sure that vaccinations work?

The simple answer:

Through laboratory, animal and human studies, and the scientific analysis of surveillance data.

Here are some examples for various diseases:


measles vaccine effectiveness


pertussis annual cases and vaccination rates




  • There are lots more examples here, and here
  • A description of the some of the epidemiological science used to assess vaccine effectiveness can be found here.


Vaccinations. They really work.

Page reviewed January 2021.
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