Your birth year predicts—to a certain extent—how likely you are to get seriously ill or die in an outbreak of an animal-origin influenza virus, according to a study co-led by researchers from the University of Arizona ...
Nov 10, 2016
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Lactic acid bacteria, commonly used as probiotics to improve digestive health, can offer protection against different subtypes of influenza A virus, resulting in reduced weight loss after virus infection and lower amounts ...
Dec 13, 2017
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Researchers have developed a universal vaccine to combat influenza A viruses that produces long-lasting immunity in mice and protects them against the limitations of seasonal flu vaccines, according to a study led by Georgia ...
Jan 24, 2018
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(Medical Xpress)—A team of researchers at Peking University has developed a new type of vaccine that they claim may allow for a new approach to generating live virus vaccines which could conceivably be adapted to any type ...
A new, double-layered nanoparticle vaccine made with peptides has been found to effectively protect mice against influenza A virus, according to a study led by Georgia State University.
Jul 30, 2018
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It happens every year, especially in winter. A virus saunters into your wide-open respiratory tract, worms its way into lung cells, and, next thing you know, you're lying in bed with a fever, aches, and chills—classic symptoms ...
Jun 1, 2022
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A new study has found that a novel avian-origin H7N9 influenza A virus, which has recently emerged in humans, attaches moderately or abundantly to the epithelium of both the upper and lower respiratory tracts. This pattern ...
Sep 10, 2013
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The over-the-counter anti-inflammatory drug naproxen may also exhibit antiviral activity against influenza A virus, according to a team of French scientists. The finding, the result of a structure-based investigation, is ...
Mar 21, 2013
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Coinfection of SARS-CoV-2 and influenza A virus changes neither the trajectory, nor the severity of influenza A virus, regardless of timing. But should the host contract influenza A virus first, the response to that infection ...
Jul 12, 2022
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Guided by insights into how mice recover after H1N1 flu, researchers at Harvard Medical School and Brigham and Women's Hospital, together with researchers at A*STAR of Singapore, have cloned three distinct stem cells from ...
Oct 27, 2011
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Influenzavirus A Influenzavirus B Influenzavirus C Isavirus Thogotovirus
Influenzavirus A is a genus of the Orthomyxoviridae family of viruses. Influenzavirus A includes only one species: Influenza A virus which causes influenza in birds and some mammals. Strains of all subtypes of influenza A virus have been isolated from wild birds, although disease is uncommon. Some isolates of influenza A virus cause severe disease both in domestic poultry and, rarely, in humans. Occasionally viruses are transmitted from wild aquatic birds to domestic poultry and this may cause an outbreak or give rise to human influenza pandemics.
Influenza A viruses are negative sense, single-stranded, segmented RNA viruses. There are several subtypes, labeled according to an H number (for the type of hemagglutinin) and an N number (for the type of neuraminidase). There are 16 different H antigens (H1 to H16) and nine different N antigens (N1 to N9). The newest H type (H16) was isolated from black-headed gulls caught in Sweden and the Netherlands in 1999 and reported in the literature in 2005.
Each virus subtype has mutated into a variety of strains with differing pathogenic profiles; some pathogenic to one species but not others, some pathogenic to multiple species.
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