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Definitions

infect

[in-fekt] / ɪnˈfɛkt /


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

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Although viruses depend entirely on the cells they infect to supply energy and manufacture proteins, producing excessive amounts of viral RNA can damage the very machinery they need to reproduce.

From Science Daily ● Oct. 21, 2026

Rabies is a rare but serious viral disease that can infect the brains of both people and animals, according to the California Department of Public Health.

From Los Angeles Times ● Oct. 1, 2026

He goes on to emphasize that what Claude found — a previously uncharacterized enzyme system found in viruses that infect bacteria — isn’t necessarily going to be useful.

From Salon ● Sep. 30, 2026

It is possible that one day, he said, someone will use a similar approach to make viral proteins or viruses themselves that infect people and evade vaccine protection or natural immune responses.

From The Wall Street Journal ● Aug. 7, 2026

He quit when the researchers started talking about injections, because he thought they’d infect him with AIDS.

From "The Immortal Life of Henrietta Lacks" by Rebecca Skloot

It’s caused by a bacteria called Yersinia pestis that infects fleas and the small mammals that host fleas, and there are actually three types of plague depending on which part of the body becomes infected.

From Slate ● Oct. 8, 2026

The other forms of plague are bubonic, which infects the lymph nodes, and septicemic, which is transmitted in the bloodstream and is also very deadly.

From The Wall Street Journal ● Oct. 6, 2026

Rabies infects very few humans in the United States and California, according to the state public health department.

From Los Angeles Times ● Oct. 1, 2026

However, this practice could act as a superspreader event – where a disease infects an unusually high number of people or animals – of the H5N1 virus.

From Science Daily ● Aug. 24, 2026

Engineered pollen blows just as easily as the original kind and infects all traditional plants in its path.

From "The Adoration of Jenna Fox" by Mary E. Pearson

Others were separated from their families after their parents, infected with the virus, were transferred to Ebola treatment centres.

From Barron's ● Oct. 23, 2026

But Bezalel Mfashingabo, 44, a Kenyan flying from Nairobi through Addis Ababa, wasn't too worried because the "infected" are in quarantine in his home country -- and so "there is not much panic".

From Barron's ● Oct. 22, 2026

At the war’s end, Mignon escaped to a displaced-persons camp in Bavaria, Germany, where she nearly died of an infected gallbladder and typhus.

From The Wall Street Journal ● Oct. 21, 2026

Certain types of RNA are known to trigger defensive responses, which can place additional stress on infected cells.

From Science Daily ● Oct. 21, 2026

If the rains failed or clouds of locusts arrived or if a fungus infected that staple species, peasants died by the thousands and millions.

From "Sapiens: A Brief History of Humankind" by Yuval Noah Harari

On Thursday, federal authorities linked shredded iceberg lettuce from a Mexican supplier for Taco Bell restaurants in five states to the outbreak infecting thousands of people.

From The Wall Street Journal ● Jul. 17, 2026

Rather than primarily infecting the lungs, H5N1 caused severe infections in the udders while leaving the respiratory system largely unaffected.

From Science Daily ● Jun. 23, 2026

In an interview with the Reuters news agency, Gaston urged the child and her mother to go to a health centre, as they risked "worsening their health" and "infecting their relatives".

From BBC ● Jun. 17, 2026

With hantavirus, the incubation period can take up to six weeks, so people must be isolated for a really long time to ensure they won’t get sick and start infecting others.

From Slate ● May 16, 2026

Librans would have to worry about dying from earth diseases, or carrying them back to Libra and infecting others.

From "Flying to the Moon: An Astronaut's Story" by Michael Collins


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