fla·​vi·​vi·​rus | \ ˈflā-vi-ˌvī-rəs How to pronounce flavivirus (audio) \

Definition of flavivirus

: any of a family (Flaviviridae and especially genus Flavivirus) of single-stranded RNA viruses transmitted especially by ticks and mosquitoes and including the causative agents of dengue, hepatitis C, hog cholera, Saint Louis encephalitis, West Nile virus, and yellow fever

Examples of flavivirus in a Sentence

Recent Examples on the Web Yellow fever, a flavivirus, has parallels to SARS-CoV-2, the novel coronavirus that causes COVID. Alicia Ault, Smithsonian Magazine, "Mail Handlers Used to Poke Holes in Envelopes to Battle Germs and Viruses," 2 June 2020 Zika, a flavivirus that falls under the same category as West Nile, causes only mild symptoms — at worst — in most people. Rose Minutaglio, PEOPLE.com, "The Zika Virus: Your Questions, Answered," 3 July 2019 However, the study said technical obstacles will delay making vaccines against Zika and other related viruses, called flaviviruses. Bradley J. Fikes, sandiegouniontribune.com, "Zika drug prevents infection in monkeys," 4 Oct. 2017 Upon entering a human body, had the long-unheralded flavivirus always had the power to attack any developing brain tissue inside its human host and wreak a special kind of havoc? Melissa Healy, latimes.com, "Once harmless, the Zika virus became lethal after a single genetic mutation took hold around 2013," 28 Sep. 2017 Also, the disease belongs to a family of viruses known as flaviviruses, which scientists have been battling for more than a century. Katie Thomas, New York Times, "Testing in Zika Zones," 19 Nov. 2016 False positives, however, are possible because Zika is a flavivirus, like dengue and yellow fever; currently a positive test result can be triggered by one of the related viruses. Marc Santora, New York Times, "C.D.C. and States Ponder Plans to Keep Ahead of Zika JUNE 21, 2016," 1 July 2016

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'flavivirus.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of flavivirus

1974, in the meaning defined above

History and Etymology for flavivirus

New Latin, from Latin flavus yellow + New Latin -i- + virus — more at virus

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Time Traveler for flavivirus

Time Traveler

The first known use of flavivirus was in 1974

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Cite this Entry

“Flavivirus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/flavivirus. Accessed 28 Feb. 2021.

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More Definitions for flavivirus


fla·​vi·​vi·​rus | \ ˈflā-vi-ˌvī-rəs How to pronounce flavivirus (audio) \

Medical Definition of flavivirus

1 capitalized : a genus of the family Flaviviridae of single-stranded RNA viruses that are transmitted by arthropod vectors and especially by ticks and mosquitoes and that include the causative agents of dengue, Japanese B encephalitis, Saint Louis encephalitis, West Nile fever, and yellow fever
2 : any virus of the genus Flavivirus or the family Flaviviridae

More from Merriam-Webster on flavivirus

Britannica.com: Encyclopedia article about flavivirus

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