Obesity a risk factor in swine flu?

(AP) -- Some swine flu cases in Michigan are raising questions about obesity's role in why some people with infections become seriously ill.

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<p><a href="http://www.physorg.com/news166470903.html">Obesity a risk factor in swine flu?</a></p> <p>(AP) -- Some swine flu cases in Michigan are raising questions about obesity's role in why some people with infections become seriously ill.</p>