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Influenza A virus (IAV) is the only species of the genus Alphainfluenzavirus of the virus family Orthomyxoviridae. [1] It is a pathogen with strains that infect birds and some mammals, as well as causing seasonal flu in humans. [2]
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).
Haemophilus influenzae (formerly called Pfeiffer's bacillus or Bacillus influenzae) is a Gram-negative, non-motile, coccobacillary, facultatively anaerobic, capnophilic pathogenic bacterium of the family Pasteurellaceae.
In Spain it was also known as the 'French flu' (gripe francesa), [51] [9] or the 'Naples Soldier' (Soldado de Nápoles), after a popular song from a zarzuela. [b] [58] Spanish flu (gripe española) is now a common name in Spain, [63] but remains controversial there. [64] [65] Othering derived from geopolitical borders and social boundaries.