spanish flu was the flu that spread over a large area in 1918.
spanish flu was the flu that spread over a large area in 1918.
flu that spread over a large area in 1918?
spanish flu
2009 flu pandemic









































the 2009 flu pandemic or "swine flu" was an influenza pandemic that lasted from early 2009 to late 2010, and the second of the two pandemics involving h1n1 influenza virus (the first of them being the 1918-20 spanish flu pandemic), albeit in a new version. first described in april 2009, the virus appeared to be a new strain of h1n1 which resulted when a previous triple reassortment of bird, swine and human flu viruses further combined with a eurasian pig flu virus, leading to the term "swine flu".
2009 flu pandemic
section::::flu spread, by season.:2016–2017 flu season.









































bullet::::- a/california/7/2009 (h1n1)pdm09-like virus,









































bullet::::- a/hong kong/4801/2014 (h3n2)-like virus









































bullet::::- b/brisbane/60/2008-like virus (b/victoria lineage)









































quadrivalent influenza vaccine adds:









































bullet::::- b/phuket/3073/2013-like strain









































section::::flu spread, by season.:2017–2018 flu season.









































bullet::::- a/michigan/45/2015 (h1n1)pdm09-like virus









































bullet::::- a/hong kong/4801/2014 (h3n2)









































bullet::::- b/brisbane/60/2008-like virus (b/victoria lineage)









































quadrivalent influenza vaccine adds









































bullet::::- b/phuket/3073/2013-like[b/yamagata lineage]









































section::::see also.









































bullet::::- 2009 h1n1 influenza outbreak









































bullet::::- bird flu









































bullet::::- dog flu









































bullet::::- horse flu









































bullet::::- human flu









































bullet::::- swine flu









































section::::further reading.









































bullet::::- graphic showing h3n2 mutations, amino acid by amino acid, among 207 isolates completely sequenced by the influenza genome sequencing project.
influenza a virus subtype h3n2