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Definitions

infectious

[in-fek-shuhs] / ɪnˈfɛk ʃəs /


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.

Dr. Amesh Adalja, an infectious disease expert and senior scholar at Johns Hopkins Center for Health Security, told Salon he is not hopeful the outbreaks can be contained at this point.

From Salon • Apr. 8, 2026

They can even detect tuberculosis, an infectious disease that commonly affects the lungs, far quicker than it would be found in a lab using conventional microscopy, Apopo has said.

From BBC • Apr. 4, 2026

Nacua became known for his infectious enthusiasm and ability to catch almost anything Rams MVP quarterback Matthew Stafford threw his way.

From Los Angeles Times • Apr. 2, 2026

Overcoming these limitations could improve how the world prepares for and responds to future infectious disease threats.

From Science Daily • Mar. 17, 2026

Neither did the early farmers understand that feeding children with more porridge and less breast milk would weaken their immune system, and that permanent settlements would be hotbeds for infectious diseases.

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