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Measuring protection

Last modified at 1/9/2014 5:54 PM by Vladimir Prikazsky

Measuring protection: efficacy versus effectiveness.

An efficacy study in the clinical development of a vaccine asks the question, "Does the vaccine work?"

In contrast, an effectiveness study usually retrospcetively as case-control or cohort study asks the question "Does vaccination help people?".

 

Ref: http://www.ncbi.nlm.nih.gov/pubmed/9855432