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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
The county estimates that nearly 80 percent of kids ages five to 17 were not vaccinated this season and that breakdown sounds familiar to Dr. Edmund Milder, a pediatric infectious disease specialist at Rady Children’s Hospital in San Diego.
—
Paul Sisson, San Diego Union-Tribune, 6 Feb. 2025
The infectious disease specialist said the vaccine is most effective at preventing tuberculosis that is in other parts of the body outside of the lungs.
—
Hannah Poukish, Sacramento Bee, 5 Feb. 2025
Should North Carolina residents be worried? Dr. David Weber, an infectious disease specialist at the UNC School of Medicine, and Dr. Nicholas Turner, an infectious disease specialist at Duke Health, say no.
—
Evan Moore, Charlotte Observer, 30 Jan. 2025
In 2023, tuberculosis overtook COVID-19 as the most deadly infectious disease, with 1.25 million people who died from infections.
—
Eduardo Cuevas, USA TODAY, 29 Jan. 2025
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Word History
First Known Use
1600, in the meaning defined above
Time Traveler
The first known use of infectious disease was
in 1600
Dictionary Entries Near infectious disease
Cite this Entry
“Infectious disease.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/infectious%20disease. Accessed 14 Feb. 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
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