Influenza D virus

Deltainfluenzavirus influenzae
Virus classification
(unranked):	Virus
Realm:	Riboviria
Kingdom:	Orthornavirae
Phylum:	Negarnaviricota
Class:	Insthoviricetes
Order:	Articulavirales
Family:	Orthomyxoviridae
Genus:	Deltainfluenzavirus
Species:	Deltainfluenzavirus influenzae
Synonyms
	Influenza D virus;

Influenza D virus is a species in the virus genus Deltainfluenzavirus, in the family Orthomyxoviridae, that causes influenza.

Influenza D viruses are known to infect pigs and cattle; no human infections from this virus have been observed.^[2] First isolated from pigs in 2011, the virus was categorized as a new genus of Orthomyxoviridae in 2016, distinct from the previously-known Influenzavirus C genus;^[2]^[3] before then, Influenza D virus was thought to be a subtype of Influenza C virus.^[2]

Cases of infections from the Type D virus are rare compared to Types A, B, and C. Similar to Type C, Type D has 7 RNA segments and encodes 9 proteins, while Types A and B have 8 RNA segments and encode at least 10 proteins.^[4]

^ "History of the taxon: Species: Deltainfluenzavirus influenzae (2024 Release, MSL #40)". International Committee on Taxonomy of Viruses. Retrieved 19 March 2025.
^ ^a ^b ^c Shuo Su; Xinliang Fu; Gairu Li; Fiona Kerlin; Michael Veit (25 August 2017). "Novel Influenza D virus: Epidemiology, pathology, evolution and biological characteristics". Virulence. 8 (8): 1580–1591. doi:10.1080/21505594.2017.1365216. PMC 5810478. PMID 28812422.
^ "New virus gets official name, influenza D". ScienceDaily. 1 September 2016. Retrieved 28 September 2018.
^ Skelton, Raegan M.; Huber, Victor C. (May 2022). "Comparing Influenza Virus Biology for Understanding Influenza D Virus". Viruses. 14 (5): 1036. doi:10.3390/v14051036. ISSN 1999-4915. PMC 9147167. PMID 35632777.

[1] "History of the taxon: Species: Deltainfluenzavirus influenzae (2024 Release, MSL #40)". International Committee on Taxonomy of Viruses. Retrieved 19 March 2025.

[Influenza_D-2] Shuo Su; Xinliang Fu; Gairu Li; Fiona Kerlin; Michael Veit (25 August 2017). "Novel Influenza D virus: Epidemiology, pathology, evolution and biological characteristics". Virulence. 8 (8): 1580–1591. doi:10.1080/21505594.2017.1365216. PMC 5810478. PMID 28812422.

[new_virus-3] "New virus gets official name, influenza D". ScienceDaily. 1 September 2016. Retrieved 28 September 2018.

[4] Skelton, Raegan M.; Huber, Victor C. (May 2022). "Comparing Influenza Virus Biology for Understanding Influenza D Virus". Viruses. 14 (5): 1036. doi:10.3390/v14051036. ISSN 1999-4915. PMC 9147167. PMID 35632777.

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