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
Pertussis
Polio
- 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.