Tests show more swine flu immunity in older folks

(AP) -- New test results show what scientists have suspected - people in their 60's and older have greater immunity to the new swine flu virus.

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<p><a href="http://www.physorg.com/news162129179.html">Tests show more swine flu immunity in older folks</a></p> <p>(AP) -- New test results show what scientists have suspected - people in their 60's and older have greater immunity to the new swine flu virus.</p>