concern about the safety and efficacy of the vaccine.
Examples of efficacy
efficacy
In the efficacy group, 52% responded to Celexa vs. 40% of the nonefficacy group.
From the time.com
Acupuncture is being studied for its efficacy in alleviating many kinds of pain.
From the theepochtimes.com
However, the differenced in perceived efficacy in all these results were slight.
From the sciencedaily.com
Measure and report on the efficacy and profitability of all marketing campaigns.
From the jobview.monster.com
The legality of such methods of interrogation is less clear than their efficacy.
From the economist.com
I think the USMC exaggerated the efficacy of the Osprey as battlefield hardware.
From the economist.com
Addicts typically have this kind of poor self concept and lack of self-efficacy.
From the blogs.psychcentral.com
The agency will not accept changes on brain scans alone as evidence of efficacy.
From the sacbee.com
Suppose, for example that life after death is proven, or the efficacy of prayer.
From the en.wikipedia.org
More examples
Capacity or power to produce a desired effect; "concern about the safety and efficacy of the vaccine"
(efficacious) marked by qualities giving the power to produce an intended effect; "written propaganda is less efficacious than the habits and prejudices...of the readers"-Aldous Huxley; "the medicine is efficacious in stopping a cough"
(efficacious) effective: producing or capable of producing an intended result or having a striking effect; "an air-cooled motor was more effective than a witch's broomstick for rapid long-distance transportation"-LewisMumford; "effective teaching methods"; "effective steps toward peace"; "made ...
Efficacy is the capacity to produce an effect. It has different specific meanings in different fields.
Intrinsic activity (IA) or efficacy refers to the relative ability of a drug-receptor complex to produce a maximum functional response. ...
The extent to which an intervention improves the outcome for people under ideal circumstances. Testing efficacy means finding out whether something is capable of causing an effect at all.
A term borrowed from pharmacology describing the maximum response of an administered supplement, regardless of the dose. At a certain point, consuming more of a particular substance fails to elicit any greater effect. ...
(Of a drug or treatment). The maximum ability of a drug or treatment to produce a result regardless of dosage. A drug passes efficacy trials if it is effective at the dose tested and against the illness for which it is prescribed. ...
A measure of the luminous efficiency of a radiant flux, expressed in lumens per watt as the quotient of the total luminous flux by the total radiant flux. For daylighting, this is the quotient of visible flux incident on a surface to radiant flux on that surface. ...