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Influenza A virus subtype H1N1 ( A/H1N1) is a subtype of influenza A virus (IAV). Some human-adapted strains of H1N1 are endemic in humans and are one cause of seasonal influenza (flu). [ 1] Other strains of H1N1 are endemic in pigs ( swine influenza) and in birds ( avian influenza ). [ 2] Subtypes of IAV are defined by the combination of the ...
The 2009 flu pandemic in South America was part of a global epidemic in 2009 of a new strain of influenza A virus subtype H1N1, causing what has been commonly called swine flu. As of 9 June 2009, the virus had affected at least 2,000 people in South America, with at least 4 confirmed deaths. On 3 May 2009, the first case of the flu in South ...
v. t. e. The pandemic H1N1/09 virus is a swine origin influenza A virus subtype H1N1 strain that was responsible for the 2009 swine flu pandemic. This strain is often called swine flu by the public media due to the prevailing belief that it originated in pigs. The virus is believed to have originated around September 2008 in central Mexico.
The 2009 swine flu pandemic, caused by the H1N1/swine flu/influenza virus and declared by the World Health Organization (WHO) from June 2009 to August 2010, was the third recent flu pandemic involving the H1N1 virus (the first being the 1918–1920 Spanish flu pandemic and the second being the 1977 Russian flu ). [ 12][ 13] The first identified ...
A/Rio de Janeiro/62434/2021 (H3N2). [29] The starting A indicates that the virus is an influenza A virus. Rio de Janeiro indicates the place of collection. 62434 is a laboratory sequence number. 2021 (or just 21) indicates that the sample was collected in 2021. No species is mentioned so by default, the sample was collected from a human.
Spanish flu (1918–1920) The 1918 flu pandemic, commonly referred to as the Spanish flu, was a category 5 influenza pandemic caused by an unusually severe and deadly Influenza A virus strain of subtype H1N1 . The difference between the influenza mortality age-distributions of the 1918 epidemic and normal epidemics.
Swine influenza is an infection caused by any of several types of swine influenza viruses. Swine influenza virus ( SIV) or swine-origin influenza virus ( S-OIV) refers to any strain of the influenza family of viruses that is endemic in pigs. [ 2] As of 2009, identified SIV strains include influenza C and the subtypes of influenza A known as ...
The UK’s first human case of swine flu strain H1N2 has been detected, the UK Health Security Agency (UKHSA) has announced.. The strain of influenza, called H1N2, is similar to flu viruses ...
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