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2009 swine flu pandemic

2009–2010 pandemic of swine influenza caused by H1N1 influenza virus
Event influenza_pandemic Q101452
2009 swine flu pandemic
Centers for Disease Control · Public Domain · Wikimedia
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Summary

2009 swine flu pandemic is an influenza pandemic[1]. It draws 4,784 Wikipedia views per month (influenza pandemic category, ranking #2 of 8).[2]

Key Facts

  • Instance of: public health emergency of international concern[3], disease outbreak[4]
  • Location: worldwide[5]
  • Commons category: 2009 swine flu outbreak[6]
  • Country of origin: United States[7], Mexico[8]
  • Start time: March 2009[9]
  • End time: August 10, 2010[10]
  • Has cause: pandemic H1N1/09 virus[11]
  • Topic's main category: Category:2009 swine flu pandemic[12]
  • Commons gallery: 2009 swine flu outbreak[13]
  • Number of deaths: 18,449[14], 284,000[15]
  • Partially coincident with: Q132863338[16], Q132863329[17], Q132863343[18], Q132863349[19]
  • Has immediate cause: pandemic H1N1/09 virus[20]
  • Basic reproduction number: 1.33[21]
  • On focus list of Wikimedia project: WikiProject COVID-19[22]

Why It Matters

2009 swine flu pandemic has Wikipedia articles in 29 language editions, a strong signal of global cultural recognition.[23] It is known by 165 alternative names across languages and contexts.[24]

Related Entities

Mexico Sergei Yesenin United States

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [3] ↑ . wikidata.org.
  2. [4] ↑ . wikidata.org.
  3. [5] ↑ . wikidata.org.
  4. [6] ↑ . wikidata.org.
  5. [7] ↑ . wikidata.org.
  6. [8] ↑ . wikidata.org.
  7. [9] ↑ . wikidata.org.
  8. [10] ↑ . wikidata.org.
  9. [11] ↑ . wikidata.org.
  10. [12] ↑ . wikidata.org.
  11. [13] ↑ . wikidata.org.
  12. [14] ↑ . who.int. who.int. Provenance: wikidata.org.
  13. [15] ↑ . cidrap.umn.edu. cidrap.umn.edu. Provenance: wikidata.org.
  14. [16] ↑ . wikidata.org.
  15. [17] ↑ . wikidata.org.
  16. [18] ↑ . wikidata.org.
  17. [19] ↑ . wikidata.org.
  18. [20] ↑ . wikidata.org.
  19. [21] ↑ . Reproduction numbers of infectious disease models. wikidata.org.
  20. [22] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [23] ↑ . Wikidata sitelinks. wikidata.org.
  3. [24] ↑ . Wikidata aliases. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). 2009 swine flu pandemic. Retrieved October 11, 2026, from https://4ort.xyz/entity/2009-swine-flu-pandemic
MLA “2009 swine flu pandemic.” 4ort.xyz Knowledge Graph, 4ort.xyz, 11 Oct. 2026, https://4ort.xyz/entity/2009-swine-flu-pandemic.
BibTeX @misc{4ortxyz_2009-swine-flu-pandemic_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{2009 swine flu pandemic}}, year = {2026}, url = {https://4ort.xyz/entity/2009-swine-flu-pandemic}, note = {Accessed: 2026-10-11}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): 2009 swine flu pandemic — https://4ort.xyz/entity/2009-swine-flu-pandemic (retrieved 2026-10-11)

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Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 8d ago · Dhx1 · 2026-10-05 view diff on Wikidata ↗
    Start time → +2009-03-00T00:00:00Z
    Has immediate cause → pandemic H1N1/09 virus
    Has cause → pandemic H1N1/09 virus
    Country of origin → —
    + 14 other properties edited (see Wikidata diff for full list)
    "/* wbsetclaim-create:2||1 */ Basic reproduction number: 1.33"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.