How to Use efficacy in a Sentence

efficacy

noun
  • The dodgy data seem to have no bearing on the safety or efficacy of the drug.
    The Economist, 28 Nov. 2019
  • But the numbers depend in part on the efficacy of the vaccines that are ready for use soonest.
    The Economist, 7 Oct. 2020
  • Whether the same efficacy holds for children remains to be seen.
    Wesley Kufel, The Conversation, 8 Dec. 2020
  • While efficacy may still be up in the air, safety isn't.
    Adrianna Rodriguez, USA TODAY, 8 June 2020
  • In at least a few cases, efficacy might even be beside the point.
    J.c. Pan, The New Republic, 4 Aug. 2020
  • This is a very new diet, so the research is out on its efficacy.
    Karla Walsh, Woman's Day, 21 Dec. 2020
  • Also, the efficacy of the short-yardage running game is very much in doubt.
    oregonlive, 11 May 2021
  • Searches were up at the start of the year as news emerged about the various vaccines and their levels of efficacy.
    Washington Post, 29 Nov. 2021
  • Ask what a treatment plan would look like, and how and when the two of you would evaluate its efficacy.
    Terri Taylor, Wired, 29 Jan. 2021
  • Pfizer is still likely to be the first out of the gate with interim results on efficacy.
    Sarah Zhang, The Atlantic, 19 Oct. 2020
  • Using the right tools for the job can also boost the efficacy of natural cleaners.
    Jolie Kerr, CNN Underscored, 9 Sep. 2020
  • If the safety and efficacy is there, the factory piece is being done.
    Cnn Staff, CNN, 30 June 2020
  • This is also a great way to test the efficacy of your education!
    Shyam Pradheep, Forbes, 17 July 2023
  • But the efficacy of strategic bombing is only half the question.
    Scott Beauchamp, The Atlantic, 30 Jan. 2016
  • Few economists would agree with the president about the efficacy of trade wars.
    Don Lee, latimes.com, 2 Mar. 2018
  • But all of that efficacy hasn't translated into the kinds of sales investors once hoped for.
    Sy Mukherjee, Fortune, 25 Nov. 2019
  • That’s in about the same range as typical efficacy for flu vaccines.
    Brenda Goodman, CNN, 22 Nov. 2022
  • Thus did smallpox open minds to the efficacy and power of science itself.
    Jon Meacham, New York Times, 7 May 2020
  • My thoughts haven’t changed about the efficacy of the Electoral College.
    AJC.com, 11 Dec. 2016
  • And while the vaccines are very protective, their efficacy wanes over time.
    Josh Fischman, Scientific American, 13 June 2022
  • Mukherjea said the timing of the doses could have an effect on efficacy.
    Kellie Hwang, San Francisco Chronicle, 24 Sep. 2021
  • The bride and groom are often able to take the reins, so coercion is lower and efficacy, higher.
    Ananya Bhattacharya, Quartz India, 27 Nov. 2019
  • And all of them need a lot of additional safety and efficacy testing.
    John Timmer, Ars Technica, 9 Dec. 2020
  • There's a lot of debate about the efficacy of state incentive programs though.
    Bryn Elise Sandberg, The Hollywood Reporter, 7 Aug. 2019
  • There are no clouds to block or even reduce solar panel efficacy.
    Caroline Delbert, Popular Mechanics, 30 Dec. 2020
  • Much would depend on how long the efficacy of a single dose would last before people needed the second dose.
    David Hogberg, Washington Examiner, 22 Dec. 2020
  • Opinions on the efficacy of charcoal toothpaste are split.
    Laura Daily, The Seattle Times, 12 Apr. 2019
  • So what do these numbers mean, and how is vaccine efficacy measured?
    The Economist, 22 Mar. 2021
  • If some customers were turned off by the sneaky charges, far more were turned on by Stiff Nights’ efficacy.
    Matthew Hongoltz-Hetling, The New Republic, 23 June 2021
  • No detailed efficacy data for the vaccine has been released though.
    Tara John, CNN, 31 Dec. 2020

Some of 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.

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