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bird flu
noun
: avian influenza
specifically
: severe often fatal influenza A caused by strains of a subtype (H5N1) of the causative orthomyxovirus that have produced epidemics in domestic birds especially in Asia with sporadic associated human infections
Examples of bird flu in a Sentence
Recent Examples on the Web
Potential symptoms of bird flu included eye redness, coughing, fatigue, fever and headaches.
—Devan Patel, The Mercury News, 11 Jan. 2025
Meta's change comes as the U.S. faces an increase in bird flu cases and continues treating patients falling ill with respiratory illnesses.
—Mary Kekatos, ABC News, 10 Jan. 2025
The Louisiana patient was sickened by the D1.1 strain of the bird flu virus, genetic sequencing by the CDC determined last month.
—Alexander Tin, CBS News, 7 Jan. 2025
This includes avoiding direct contact with wild birds or any animals that might be infected or suspected of having bird flu.
—Bruce Gil, Quartz, 7 Jan. 2025
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Word History
First Known Use
1972, in the meaning defined above
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Cite this Entry
“Bird flu.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/bird%20flu. Accessed 18 Jan. 2025.
Medical Definition
bird flu
noun
: avian influenza
specifically
: severe often fatal influenza A caused by strains of a subtype (H5N1) of the causative orthomyxovirus that have produced epidemics in domestic birds especially in Asia with sporadic associated human infections
More from Merriam-Webster on bird flu
Britannica.com: Encyclopedia article about bird flu
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