swine flu

noun

: swine influenza
also : influenza A of humans that is caused by a different strain of an orthomyxovirus subtype (H1N1) from those found in swine and that is marked especially by fever, sore throat, cough, chills, body aches, fatigue, and sometimes diarrhea and vomiting

Examples of swine flu in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
That’s more than at any time since the swine flu pandemic 15 years ago. Jade Walker, CNN Money, 7 May 2025 There were 216 children who died this season, according to a preliminary count from the Centers for Disease Control and Prevention (CDC), the most since 2009 when there was a global swine flu pandemic. Nathaniel Weixel, The Hill, 2 May 2025 But the potential for influenza A viruses that typically infect animals to cause pandemics in humans like the swine flu pandemic is why experts are concerned about the current avian influenza outbreak. Hanna D. Paton, The Conversation, 15 Apr. 2025 And as measured by outpatient visits for flulike symptoms, the level of illness in the U.S. has been comparable to that of the 2009 H1N1 (swine flu) pandemic. Tanya Lewis, Scientific American, 6 Mar. 2025 See All Example Sentences for swine flu

Word History

First Known Use

1919, in the meaning defined above

Time Traveler
The first known use of swine flu was in 1919

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Cite this Entry

“Swine flu.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/swine%20flu. Accessed 4 Jun. 2025.

Medical Definition

swine flu

noun
: swine influenza
also : influenza of humans that is caused by a subtype (H1N1) of an orthomyxovirus (species Influenza A virus of the genus Influenzavirus A) originating in swine and is marked especially by fever, sore throat, cough, chills, body aches, fatigue, and sometimes diarrhea and vomiting
Among the swine flu cases in the United States, none had had any contact with pigs … Marc Lacey and Donald G. McNeil Jr., The New York Times
As swine flu spreads from person to person around the world, it is most often being transmitted by coughing or sneezing … Laura Landro, The Wall Street Journal

More from Merriam-Webster on swine flu

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