infectious disease

noun

: a disease (such as influenza, malaria, meningitis, rabies, or tetanus) caused by the entrance into the body of pathogenic agents or microorganisms (such as bacteria, viruses, protozoans, or fungi) which grow and multiply there compare communicable disease, contagious disease

Examples of infectious disease in a Sentence

Recent Examples on the Web
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Programs targeting infant mortality, youth violence, smoking, maternal and child health, mental health, obesity, lead poisoning and infectious disease tracking have been slashed. Stan Chu Ilo, Chicago Tribune, 3 Sep. 2025 His condition went unaddressed during nearly four months in Eloy Detention Center, and three leading infectious disease public health researchers said opportunities to save his life were missed. Billal Rahman, MSNBC Newsweek, 3 Sep. 2025 Furthermore, as at-home diagnostics expand, patients will increasingly rely on genAI to interpret results from cancer screenings (colon and cervical), infectious disease swabs (COVID-19, STIs) and other clinical tests. Robert Pearl, Forbes.com, 2 Sep. 2025 But rehabilitation of deer in the county violates regulations meant to curb the spread of a deadly infectious disease, according to the department, which said the facility was unpermitted and holding the deer illegally. Connor Giffin, The Courier-Journal, 28 Aug. 2025 See All Example Sentences for infectious disease

Word History

First Known Use

1600, in the meaning defined above

Time Traveler
The first known use of infectious disease was in 1600

Browse Nearby Words

Cite this Entry

“Infectious disease.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/infectious%20disease. Accessed 5 Sep. 2025.

Kids Definition

infectious disease

noun
: a disease caused by the presence, growth, and increase in numbers of germs in the body

Medical Definition

infectious disease

noun
: a disease (as influenza, malaria, meningitis, rabies, or tetanus) caused by the entrance into the body of pathogenic agents or microorganisms (as bacteria, viruses, protozoans, or fungi) which grow and multiply there compare communicable disease, contagious disease
Last Updated: - Updated example sentences
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