infected

adjective

in·​fect·​ed in-ˈfek-təd How to pronounce infected (audio)
Synonyms of infectednext
: 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.
Wash your hands regularly, don’t touch your face, clean surfaces and avoid infected people, the site said. Don Sweeney, Sacbee.com, 3 Mar. 2026 Nine out of 10 people exposed to measles become infected if not vaccinated or with natural immunity. Eleanor Nash, Kansas City Star, 3 Mar. 2026 Do not compost infected plants. Arricca Elin Sansone, Southern Living, 3 Mar. 2026 While working on the vaccine, Plotkin was also caring for infected babies and pregnant women. Helen Branswell, STAT, 2 Mar. 2026 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

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Cite this Entry

“Infected.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/infected. Accessed 5 Mar. 2026.

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