non·​in·​fec·​tious ˌnän-in-ˈfek-shəs How to pronounce noninfectious (audio)
: not infectious or caused by infection
noninfectious diseases
a vaccine containing inactivated noninfectious viruses
noninfectious allergic conjunctivitis

Examples of noninfectious in a Sentence

Recent Examples on the Web Their discoveries have opened up a new chapter in medicine, paving the way for new vaccines for other infectious diseases, including the flu, and treatments for noninfectious diseases such as cancer. Katie Hunt, CNN, 2 Oct. 2023 When the incidence of a noninfectious disease changes so quickly — faster than our genomes can possibly accumulate new mutations that increase susceptibility — scientists suspect that changes in the environment are responsible. Moises Velasquez-Manoff, New York Times, 4 Oct. 2023 The remaining challenges to public health there, it was thought, stemmed from noninfectious conditions such as cancer, heart disease and degenerative diseases. Maryn McKenna, Scientific American, 1 Sep. 2020 Fischman: And noninfectious ones like cancer and heart disease, reproductive health and mental health. Josh Fischman, Scientific American, 1 Mar. 2023 Another is to use noninfectious viral components, such as the proteins used for flu vaccines. Matthew Woodruff, The Conversation, 25 Jan. 2023 The adult population with ITP, a chronic and noninfectious disease, numbers approximately 100,000 in the United States, with women outnumbering men by some three to two. Robert A Norman, Discover Magazine, 16 Sep. 2011 Your wife would be considered noninfectious on day 10, but the most conservative recommendation is to discontinue isolation only after a person has tested negative (ideally, two negative tests taken 48 hours apart) after day 5. Dr. Keith Roach, oregonlive, 28 Dec. 2022 Virus preparations pure enough to crystallize usually provide the best material for chemical studies, allowing scientists to split the poliovirus into infectious and noninfectious parts and lay the groundwork for development of the polio vaccine. Scott Lafee, San Diego Union-Tribune, 1 Nov. 2022

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'noninfectious.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1850, in the meaning defined above

Time Traveler
The first known use of noninfectious was in 1850

Dictionary Entries Near noninfectious

Cite this Entry

“Noninfectious.” Dictionary, Merriam-Webster, Accessed 18 Apr. 2024.

Medical Definition


non·​in·​fec·​tious -in-ˈfek-shəs How to pronounce noninfectious (audio)
: not infectious
noninfectious disease
noninfectious endocarditis

More from Merriam-Webster on noninfectious

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