How to Use infectious in a Sentence

infectious

adjective
  • She has an infectious grin.
  • His love for his work was infectious.
    — Guy Davies, ABC News, 25 June 2026
  • The kills are gory, the satire is thick, and the charm is so infectious.
    — Deanna Janes, Harper's BAZAAR, 4 Aug. 2023
  • Chaos would not be a good way to combat infectious pathogens.
    — Bruce Y. Lee, Forbes.com, 30 Mar. 2025
  • There can be people that are infectious that don’t even know it.
    — Sean Krofssik, Hartford Courant, 30 Apr. 2025
  • Its roughshod charm is infectious.
    — Tim Grierson, Vulture, 16 Aug. 2025
  • It’s spread through contact with infectious droplets or through the air.
    — Letters To The Editor, The Orlando Sentinel, 11 Feb. 2026
  • If some of the stuff in his lungs was infectious, maybe he could be treated and get home.
    — Elisabeth Rosenthal, Miami Herald, 24 Apr. 2026
  • Garcia says her son loved to cook and fish and had an infectious smile that would light up a room.
    — Brooke Taylor, Fox News, 28 Oct. 2024
  • That happy mistake is a big part of what makes the song so infectious.
    — Ryan Brennan april 8, Kansas City Star, 8 Apr. 2026
  • The melody and the chorus are infectious.
    — Irene Kim, Vogue, 16 Jan. 2026
  • And norovirus can remain infectious in water for two months or more.
    — Lauren J. Young, Scientific American, 14 Mar. 2023
  • It’s known as the leading cause of infectious blindness in the world.
    — Sean Mowbray, Discover Magazine, 28 Apr. 2023
  • Once scabs fall off, the area is no longer infectious, health officials say.
    — Stephanie Innes, The Arizona Republic, 7 June 2022
  • And there are so many other pathogens that lead to these kinds of post-infectious syndromes.
    — Quanta Magazine, 21 June 2022
  • Benny’s love for comics was infectious and amazing to be around.
    — Becca Longmire, Peoplemag, 11 June 2024
  • Kealan has a way of sharing his sense of humor with those around him and his laugh is infectious!
    — BostonGlobe.com, 7 May 2023
  • There’s a sense of affection in that scene and the rest of the movie that is just so infectious.
    — Alison Foreman, IndieWire, 24 May 2025
  • These girls could sing, dance, and put on a show that’s indisputably infectious.
    — Mekita Rivas, refinery29.com, 15 Aug. 2023
  • Thank you for your infectious laughter.
    — Brian Anthony Hernandez, PEOPLE, 21 Sep. 2025
  • Oh my gosh, his energy is just so infectious.
    — Anthony Robledo, USA Today, 19 Dec. 2025
  • Povich was clearly having a ball, and that was infectious.
    — Bethy Squires, Vulture, 1 May 2026
  • The growths themselves are not infectious.
    — Stephanie Pappas, Scientific American, 14 Aug. 2025
  • Liam had an energy for life and a passion for work that was infectious.
    — Lindsay Kimble, People.com, 18 Oct. 2024
  • Liam had an energy for life and a passion for work that was infectious.
    — Daniela Avila, PEOPLE, 22 May 2026
  • Liam had an energy for life and a passion for work that was infectious.
    — Daniela Avila, People.com, 18 Aug. 2025
  • That sense of glee in a couple of hometown guys getting away with it is infectious.
    — David Fear, Rolling Stone, 1 Aug. 2024
  • Rosenberg is thrilled to see the infectious song still landing arrows to the heart.
    — Jem Aswad, Variety, 21 Mar. 2023
  • What is present, however, is a clear and infectious love of life and music.
    — Chris Barilla, PEOPLE, 17 Apr. 2026
  • The joy of everyone on stage was infectious.
    — Jake Harris, Fort Worth Star-Telegram, 28 Feb. 2026

Some of these examples are programmatically compiled from various online sources to illustrate current usage of the word 'infectious.' 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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