H1N1

noun

A strain of influenza, the most common cause of flu in humans; also the strain responsible for swine flu.

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Meanings

nounH1N1 (uncountable)
  1. uncountablemedicineA strain of influenza, the most common cause of flu in humans; also the strain responsible for swine flu.

    The current H1N1 virus (swine flu) is a mixture of avian flus that passed through pigs to humans.

    2010, Malcolm Knox, The Monthly, April 2010, Issue 55, The Monthly Ptd Ltd, page 44

Synonyms & antonyms

Also see
influenzavirus h1n1

Origin

The strain classified as containing hemagglutinin type 1, and neuraminidase type 1.

Full word history & related roots →
Cite this entry
APA

H1N1. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/H1N1

MLA

“H1N1.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/H1N1. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “H1N1,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/H1N1.

Source: H1N1 on Wiktionary, CC BY-SA 4.0.