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The G4 virus, also known as the "G4 swine flu virus" (G4) and "G4 EA H1N1", is a swine influenza virus strain discovered in China. [68] The virus is a variant genotype 4 (G4) Eurasian avian-like (EA) H1N1 virus that mainly affects pigs, but there is some evidence of it infecting people. [ 68 ]
The virus is a novel strain of the influenza virus, [2] for which existing vaccines against seasonal flu provided no protection. A study at the U.S. Centers for Disease Control and Prevention (CDC) published in May 2009 found that children had no preexisting immunity to the new strain but that adults, particularly those over 60, had some degree of immunity.
The virus is a variant genotype 4 (G4) Eurasian avian-like (EA) H1N1 virus that mainly affects pigs, but there is some evidence of it infecting people. [119] A peer-reviewed paper from the Proceedings of the National Academy of Sciences ( PNAS ) stated that "G4 EA H1N1 viruses possess all the essential hallmarks of being highly adapted to ...
The 1918–1920 flu pandemic, also known as the Great Influenza epidemic or by the common misnomer Spanish flu, was an exceptionally deadly global influenza pandemic caused by the H1N1 subtype of the influenza A virus.
Pigs usually recover within 3–7 days after symptoms appear. Prevention and control measures include inactivated vaccines and culling infected herds. Influenza A virus subtypes H1N1, H1N2, and H3N2 are usually responsible for swine flu. [92] Some influenza A viruses can be transmitted via aerosols from pigs to humans and vice versa. [1]
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Influenza A virus (Alphainfluenzavirus influenzae) [1] or IAV is the only species of the genus Alphainfluenzavirus of the virus family Orthomyxoviridae. [2] It is a pathogen with strains that infect birds and some mammals, as well as causing seasonal flu in humans. [3]
Orthomyxoviridae (from Ancient Greek ὀρθός (orthós) 'straight' and μύξα (mýxa) 'mucus') [1] is a family of negative-sense RNA viruses.It includes seven genera: Alphainfluenzavirus, Betainfluenzavirus, Gammainfluenzavirus, Deltainfluenzavirus, Isavirus, Thogotovirus, and Quaranjavirus.