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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.
Influenza A virus subtype H1N1 (A/H1N1) is a subtype of influenza A virus (IAV). Some human-adapted strains of H1N1 are endemic in humans and are one cause of seasonal influenza (flu). [ 1 ] Other strains of H1N1 are endemic in pigs ( swine influenza ) and in birds ( avian influenza ). [ 2 ]
In 1976, an outbreak of the swine flu, influenza A virus subtype H1N1 at Fort Dix, New Jersey caused one death, hospitalized 13, and led to a mass immunization program.. After the program began, the vaccine was associated with an increase in reports of Guillain–Barré syndrome (GBS), which can cause paralysis, respiratory arrest, and d
Swine influenza is caused by influenza A subtypes H1N1, [38] H1N2, [38] H2N3, [39] H3N1, [40] and H3N2. [38] In pigs, four influenza A virus subtypes (H1N1, H1N2, H3N2 and H7N9) are the most common strains worldwide. [8] In the United States, the H1N1 subtype was exclusively prevalent among swine populations before 1998. Since late August 1998 ...
The 2009 swine flu pandemic, caused by the H1N1/swine flu/influenza virus and declared by the World Health Organization (WHO) from June 2009 to August 2010, was the third recent flu pandemic involving the H1N1 virus (the first being the 1918–1920 Spanish flu pandemic and the second being the 1977 Russian flu).
It was caused by a novel H1N1 strain that was a reassortment of human, swine, and avian influenza viruses. [20] [4] The 2009 pandemic had the effect of replacing prior H1N1 strains in circulation with the novel strain but not any other influenza viruses. Consequently, H1N1, H3N2, and both influenza B virus lineages have been in circulation in ...
Kawaoka and his colleagues combined the H5 hemagglutinin gene from the bird flu virus with genes from the 2009 H1N1 swine flu virus. ... Chrissy Teigen 'very scared' as she evacuates home amid LA ...
The Centers for Disease Control and Prevention (CDC) identified the first two A/09(H1N1) swine flu cases in California on April 17, 2009, via the Border Infectious Disease Program, [135] for a San Diego County child, and a naval research facility studying a special diagnostic test, where influenza sample from the child from Imperial County was tested. [136]