The efficacy of the new drug was tested in several clinical trials
Researchers are studying the efficacy of different teaching methods
The efficacy of the treatment depends on the stage of the disease
The drug's efficacy was questioned due to its side effects
The company is proud of the efficacy of its product
Hi there! I'm trying to decide between these two different cleaning products. Have you used either?
Actually, I haven't. But I've read some reviews. They mentioned that one has a higher level of **efficacy** against tough stains than the other.
Oh, that's interesting! Did the reviews go into any detail about how they measured the efficacy, or what kind of stains they tested against?
The study examined the efficacy of the new vaccine
The research investigated how well the new vaccine worked
Researchers evaluated the effectiveness of the new vaccine
The trial determined the ability of the new vaccine to produce a desired effect
Scientists tested the performance of the new vaccine