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Published on: August 14, 2019
[Influenza pandemic (H1N1) 2009]
1Department of Virology Tohoku University Graduate School of Medicine. oshitanih@mail.tains.tohoku.ac.jp
Uirusu
|March 12, 2010
Summary
Pandemic (H1N1) 2009 differed from expectations, prompting a re-evaluation of influenza pandemic strategies. This review considers the unique characteristics of the H1N1 virus compared to previous influenza threats like avian A(H5N1).
Area of Science:
- Virology
- Epidemiology
- Public Health
Context:
- Influenza pandemics historically occur every 20-30 years.
- Highly pathogenic avian influenza A(H5N1) caused global outbreaks with high mortality.
- The 2009 pandemic was caused by influenza A(H1N1) of swine origin, distinct from A(H5N1).
Purpose:
- To analyze the distinct characteristics of the 2009 pandemic (H1N1) influenza.
- To compare the 2009 H1N1 pandemic with previous influenza pandemics and avian A(H5N1) outbreaks.
- To propose a reconsideration of influenza pandemic concepts and strategies based on the 2009 H1N1 experience.
Summary:
- The 2009 pandemic (H1N1) virus, originating from swine, exhibited different characteristics than anticipated and was less virulent in humans than avian A(H5N1).
- The A(H1N1) subtype has circulated in humans since 1977, adding complexity to pandemic understanding.
- The 2009 pandemic deviated from expected patterns, necessitating a review of established influenza pandemic preparedness.
Impact:
- Highlights the need for adaptable strategies in influenza pandemic preparedness.
- Informs future public health responses to novel influenza strains.
- Contributes to a better understanding of viral evolution and pandemic dynamics.
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