Influenza A virus subtype H1N1
Influenza A virus subtype H1N1
Influenza A virus subtype H1N1 (pronounced as "H-one-N-one") is a subtype of Influenza A virus that was the most common cause of human influenza (flu) in 2009, and is associated with the 1918 outbreak known as the Spanish Flu.
Etymology
The name "H1N1" is derived from the virus's two main surface proteins, H1 (hemagglutinin type 1) and N1 (neuraminidase type 1).
History
The 1918 flu pandemic (January 1918 – December 1920), also known as the Spanish flu, was an unusually deadly influenza pandemic caused by the H1N1 influenza A virus. The 2009 flu pandemic was another global outbreak of a new strain of H1N1, often referred to as "swine flu".
Symptoms
Symptoms of H1N1 in humans are similar to those of other flu strains: fever, cough, sore throat, body aches, headache, chills, and fatigue. The 2009 outbreak showed an increased percentage of patients reporting diarrhea and vomiting.
Prevention and Treatment
The Influenza vaccine, also known as the flu shot, is used to prevent the flu. Antiviral drugs can be used to treat illness caused by the H1N1 virus.
Related Terms
External links
- Medical encyclopedia article on Influenza A virus subtype H1N1
- Wikipedia's article - Influenza A virus subtype H1N1
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