What is swine flu?
By Dr Ananya Mandal, MD
Swine flu is influenza caused by the H1N1 virus.
This virus strain is a new one that caused a worldwide spread of infection from June 2009 to August 2010.
The variant of the virus is now termed 2009 H1N1 by the Centers for Disease Control and Prevention.
The Swine flu virus is a type of influenza A. There are also influenza B and C type of viruses. (1, 2, 3)
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