2009 flu pandemic timeline
| 2009 flu pandemic | |
|---|---|
 Map of confirmed cases of the 2009 H1N1 pandemic | |
| Disease | H1N1 influenza |
| Virus strain | H1N1 |
| Location | Worldwide |
| First outbreak | Veracruz, Mexico |
| Date | April 2009 – August 2010 |
| Confirmed cases | 491,382 (as of August 2010) |
Deaths | 18,449 (as of August 2010) |
The 2009 flu pandemic, also known as the H1N1 pandemic, was an outbreak of a new strain of H1N1 influenza that spread globally from April 2009 to August 2010. This article provides a detailed timeline of the pandemic, highlighting key events and responses.
Timeline[edit | edit source]
March 2009[edit | edit source]
April 2009[edit | edit source]
- April 12: The first known case in the United States is identified in California.
- April 23: The CDC confirms the presence of the H1N1 virus in the United States.
- April 25: The WHO declares the outbreak a "public health emergency of international concern."
May 2009[edit | edit source]
- May 5: The WHO raises the pandemic alert level to Phase 5, indicating widespread human infection.
- May 11: The first H1N1-related death outside of North America is reported in Costa Rica.
June 2009[edit | edit source]
- June 11: The WHO declares the outbreak a pandemic, raising the alert level to Phase 6, the highest level.
July 2009[edit | edit source]
- July 16: The WHO reports that the pandemic is spreading at an "unprecedented speed."
August 2009[edit | edit source]
- August 10: The WHO announces that the pandemic is still in its early stages.
October 2009[edit | edit source]
- October 5: The first doses of the H1N1 vaccine are administered in the United States.
November 2009[edit | edit source]
- November 12: The WHO reports that the pandemic has peaked in North America.
2010[edit | edit source]
- August 10: The WHO declares the end of the H1N1 pandemic, transitioning to a post-pandemic phase.
Impact[edit | edit source]
The 2009 H1N1 pandemic resulted in significant global morbidity and mortality, with an estimated 151,700 to 575,400 deaths worldwide. The pandemic highlighted the need for improved global surveillance and response systems for infectious diseases.
Also see[edit | edit source]
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