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Swine influenza

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http://journals.plos.org/plosone/browse/swine_influenza

Swine influenza

10.450.40.10.20^Swine influenza|60.190.210.280^Swine influenza

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Swine flu is the popular name for influenza (flu) caused by a relatively new strain of influenza virus A. It was responsible for the flu pandemic in 2009-10. The virus is officially known as influenza virus A/H1N1pdm09. The swine flu pandemic The virus was first identified in Mexico in April 2009 and was also known as Mexican flu. It became known as swine flu because the virus closely resembled known influenza viruses that cause illness in pigs. It spread rapidly from country to country because it was a new type of flu virus that few people were immune to. The pandemic proved to be relatively mild and was not as serious as originally predicted. As in other countries, most cases reported in the UK were mild. However, a small number of cases resulted in serious illness and death. These were mostly in the very elderly, very young, pregnant women, or people with a pre-existing health condition, such as cancer, that had already weakened their immune systems. On August 10 2010, the World Health Organization (WHO) declared the pandemic was officially over. Seasonal flu The virus now circulates worldwide as one of three seasonal flu viruses. The other viruses are influenza virus B and influenza virus A/H3N2. http://www.nhs.uk/conditions/pandemic-flu/pages/introduction.aspx RD

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