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Influenza virus nomenclature (for a Fujian flu virus) Influenza viruses comprise four species, each the sole member of its own genus. The four influenza genera comprise four of the seven genera in the family Orthomyxoviridae. They are: [1] [18] Influenza A virus, genus Alphainfluenzavirus; Influenza B virus, genus Betainfluenzavirus
Variants of Influenza A virus are identified and named according to the isolate that they are like and thus are presumed to share lineage (example Fujian flu virus like); according to their typical host (example Human flu virus); according to their subtype (example H3N2); and according to their deadliness (e.g., Low Pathogenic as discussed below).
The virus is related to human influenza virus but was thought to lack the ability to infect humans. However, it appears that the virus has recently developed the ability to move from bird hosts ...
The subtypes of influenza A virus are estimated to have diverged 2,000 years ago. Influenza viruses A and B are estimated to have diverged from a single ancestor around 4,000 years ago, while the ancestor of influenza viruses A and B and the ancestor of influenza virus C are estimated to have diverged from a common ancestor around 8,000 years ago.
Influenza (flu) Diagnostic methods that can identify influenza include viral cultures , antibody- and antigen-detecting tests, and nucleic acid-based tests. Treatment of influenza in cases of mild or moderate illness is supportive and includes anti-fever medications such as acetaminophen and ibuprofen , adequate fluid intake to avoid ...
Biosafety level 3 equipment is used for research with viruses such as influenza that can cause serious disease but for which treatment is available. The biosafety cabinet uses HEPA filters to filter viruses out of the air. This researcher is examining reconstructed 1918 pandemic influenza virus, or "Spanish flu". Credit: CDC (2005)
The 2009 flu pandemic was a global outbreak of a new strain of influenza A virus subtype H1N1, first identified in April 2009, termed Pandemic H1N1/09 virus by the World Health Organization (WHO) [4] and colloquially called swine flu. The outbreak was first observed in Mexico, [1] [5] and quickly spread globally. On 11 June 2009, WHO declared ...
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