Synonyms
Examples of efficacy in a Sentence
In the planner's view, Rumsfeld had two goals: to demonstrate the efficacy of precision bombing and to "do the war on the cheap."
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Seymour M. Hersh, New Yorker, 7 Apr. 2003
Vaccines exist, but their efficacy against aerosolized plague is unknown.
—Sharon Begley et al., Newsweek, 8 Oct. 2001
… efficacy does not have to be demonstrated before homeopathic products are marketed.
—Alison Abbott et al., Nature, 26 Sept. 1996
questioned the efficacy of the alarms in actually preventing auto theft
Seymour M. Hersh, New Yorker, 7 Apr. 2003
Vaccines exist, but their efficacy against aerosolized plague is unknown.
—Sharon Begley et al., Newsweek, 8 Oct. 2001
… efficacy does not have to be demonstrated before homeopathic products are marketed.
—Alison Abbott et al., Nature, 26 Sept. 1996
questioned the efficacy of the alarms in actually preventing auto theft
Recent Examples on the Web
The independent candidate, who officially launched his presidential bid last fall, is famously known for espousing conspiracy theories about the efficacy of vaccines.
—Gabriella Abdul-Hakim, ABC News, 18 Apr. 2024
Some homeopathic healthcare providers swear by its efficacy, as do many users, but limited scientific evidence exists.
—Isadora Baum, Health, 13 Apr. 2024
See all Example Sentences for efficacy 
Gabriella Abdul-Hakim, ABC News, 18 Apr. 2024
Some homeopathic healthcare providers swear by its efficacy, as do many users, but limited scientific evidence exists.
—Isadora Baum, Health, 13 Apr. 2024
See all Example Sentences for efficacy
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'efficacy.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Dictionary Entries Near efficacy
Cite this Entry
“Efficacy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/efficacy. Accessed 25 Apr. 2024.
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