Efficacy
How well a study treatment works in the study.
How to say: Efficacy
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An example of efficacy is how well a vaccine prevents infection.
USE IN A SENTENCE
A study might compare the efficacy of two different treatments.
MORE INFO
Efficacy is not the same as effectiveness. Efficacy is how well a study treatment works in the study. Effectiveness is how well the treatment works in the real world after the study ends.
WORDS OPPOSITE TO EFFICACY
OTHER RESOURCES
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