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."
—
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
For example, in obesity trials, the efficacy of Eli Lilly's pill appeared to come in slightly below that of Novo Nordisk's oral semaglutide.
—Annika Kim Constantino,bertha Coombs, CNBC, 21 Oct. 2025
Under the new law, counties can continue to harvest data about the efficacy of their own CalFresh programs.
—Calmatters, Mercury News, 20 Oct. 2025
Replacements came in for both, but their efficacy in those roles is still to be determined with just a few games under their belt.
—Braidon Nourse, Denver Post, 19 Oct. 2025
Harvard sociologist and Assistant Professor of Public Policy Liz McKenna said that in the past, movements of this scale have succeeded in influencing social change, but that their efficacy has dropped significantly since the turn of the century.
—NPR, 18 Oct. 2025
See All Example Sentences for efficacy
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Annika Kim Constantino,bertha Coombs, CNBC, 21 Oct. 2025
Under the new law, counties can continue to harvest data about the efficacy of their own CalFresh programs.
—Calmatters, Mercury News, 20 Oct. 2025
Replacements came in for both, but their efficacy in those roles is still to be determined with just a few games under their belt.
—Braidon Nourse, Denver Post, 19 Oct. 2025
Harvard sociologist and Assistant Professor of Public Policy Liz McKenna said that in the past, movements of this scale have succeeded in influencing social change, but that their efficacy has dropped significantly since the turn of the century.
—NPR, 18 Oct. 2025
See All Example Sentences for efficacy
Cite this Entry
“Efficacy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/efficacy. Accessed 29 Oct. 2025.
Copy CitationKids Definition
Love words? Need even more definitions?
Merriam-Webster unabridged
Share