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The CDC says 12 people are believed to be infected across five states.
The CDC says 12 people are believed to be infected across five states.

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    CDC: New strain of swine flu

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CDC: New strain of swine flu

CDC reports that 12 cases have been confirmed in the second half of 2011. CNN's Elizabeth Cohen reports.

CDC: New strain of swine flu

CDC reports that 12 cases have been confirmed in the second half of 2011. CNN's Elizabeth Cohen reports.