infected

adjective

in·​fect·​ed in-ˈfek-təd How to pronounce infected (audio)
: having an infection : contaminated with an infective agent (such as a bacterium or virus)
an infected wound
Through a number of different means, these viruses persist at very low, hard-to-detect levels in infected cells.The Journal of the American Medical Association
She explains that leptospirosis bacteria are shed in the urine of infected animals.Tania Banak
The fungus produces as many as 1 million conidia per square centimeter of infected leaf surface.G. B. Lucas

Examples of infected in a Sentence

Recent Examples on the Web
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.
According to the Mayo Clinic, there’s no immediate sign that you’ve been infected with rabies, the deadly virus that’s nearly always spread to humans from contact with an infected animal. Vanessa Etienne, People.com, 24 July 2025 There are no vaccines or medications to prevent or treat West Nile virus but very few infected feel sick. Marina Johnson, Louisville Courier Journal, 23 July 2025 People can also become infected due to contaminated raw or undercooked seafood, especially shellfish such as oysters. Joyce Orlando, Nashville Tennessean, 21 July 2025 Mussels and their larvae spread in two ways: By floating downstream or when they are transported by people from an infected body of water on boats, boots and bouys. Elise Schmelzer, Denver Post, 20 July 2025 See All Example Sentences for infected

Word History

Etymology

from past participle of infect

First Known Use

1534, in the meaning defined above

Time Traveler
The first known use of infected was in 1534

Browse Nearby Words

Cite this Entry

“Infected.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/infected. Accessed 29 Jul. 2025.

More from Merriam-Webster on infected

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!