Swine flu could protect against deadly mutation: experts

The global outbreak of swine flu hovering just below the pandemic threshold could provide immunity for those already infected if the virus mutates into a more deadly form, scientists have told AFP.

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<p><a href="http://www.physorg.com/news160896138.html">Swine flu could protect against deadly mutation: experts</a></p> <p> The global outbreak of swine flu hovering just below the pandemic threshold could provide immunity for those already infected if the virus mutates into a more deadly form, scientists have told AFP.</p>