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infect

verb

in·​fect in-ˈfekt How to pronounce infect (audio)
infected; infecting; infects

transitive verb

1
: to contaminate with a disease-producing substance or agent (such as bacteria)
2
a
: to communicate a pathogen or a disease to
b
of a pathogenic organism : to invade (an individual or organ) usually by penetration
c
of a computer virus : to become transmitted and copied to (a device, such as a computer)
3
a
: contaminate, corrupt
the inflated writing that infects such stories
b
: to work upon or seize upon so as to induce sympathy, belief, or support
trying to infect their salespeople with their enthusiasm
infector
in-ˈfek-tər How to pronounce infect (audio)
noun

Example Sentences

If you're sick you should stay home to avoid infecting other people in the office. The virus has infected many people. They were unable to prevent bacteria from infecting the wound. Her enthusiasm has infected everyone. The virus has infected many computers. All the computers in the office were infected by the same virus. See More
Recent Examples on the Web At the orchard in Syracuse this June, a team working with Andy Newhouse, a biologist and assistant director of the restoration project, had dug hooks into their tiny trunks to intentionally infect them with the fungus. BostonGlobe.com, 30 Aug. 2022 Meta’s current policies explicitly ban a wide array of false claims about Covid-19, such as that the illness can be transmitted by 5G wireless technology or that Covid-19 tests can infect you with the virus. Brian Fung, CNN, 26 July 2022 In fact, the vaccinated mice and monkeys had little to no detectable virus in their systems despite attempts to infect them with either SARS-CoV or SARS-CoV-2. Corinne Purtill, Los Angeles Times, 5 July 2022 In a 2018 paper published in Science, Carroll and his co-authors estimated that there are 1.7 million unknown viruses still out there, roughly half of them with the capacity to infect people. Matthew Hutson, The New Yorker, 2 Sep. 2022 Monkeypox has quickly spread around the world to infect more than 47,000 people, and about 1.7 million Americans are at high risk of catching it, health officials estimate. Madison Muller, Anchorage Daily News, 29 Aug. 2022 Monkeypox has quickly spread around the world to infect more than 47,000 people, and about 1.7 million Americans are at high risk of catching it, health officials estimate. Madison Muller, BostonGlobe.com, 29 Aug. 2022 Each one of these successive waves of new infections allow the virus to infect people who were previously infected as well as evade the waning immunity such as provided by vaccines. William A. Haseltine, Forbes, 17 Aug. 2022 It is closely related to two other henipaviruses known to infect people — Hendra virus and Nipah virus, both of which can be fatal. Leada Gore | Lgore@al.com, al, 11 Aug. 2022 See More

Word History

Etymology

Middle English infecten, enfecten "to inflict with disease, pollute, damage, corrupt," borrowed from Latin infectus, past participle of inficere "to dye, discolor, impregnate, taint, contaminate with disease," from in- in- entry 2 + facere "to make, bring about, perform, do" — more at fact

First Known Use

14th century, in the meaning defined at sense 2a

Time Traveler
The first known use of infect was in the 14th century

Phrases Containing infect

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