Scientists learn why the flu may turn deadly

As the swine flu continues its global spread, researchers from the Children's Hospital of Philadelphia, Pennsylvania, have discovered important clues about why influenza is more severe in some people than it is in others.

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<p><a href="http://www.physorg.com/news160659764.html">Scientists learn why the flu may turn deadly</a></p> <p>As the swine flu continues its global spread, researchers from the Children's Hospital of Philadelphia, Pennsylvania, have discovered important clues about why influenza is more severe in some people than it is in others. </p>