Tests show more swine flu immunity in older folks

May 21, 2009 By MIKE STOBBE , AP Medical Writer

(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.

The analysis was released Thursday by the Centers for Disease Control and Prevention in Atlanta. But officials there say it's not clear how safe are from the new infection. Their advice is that older folks should take the same precautions as their children and grandchildren.

The CDC said tests show higher levels of swine flu-fighting in the blood of older people than in younger ones, probably from exposure to earlier viruses similar to .

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