Scientists struggle to understand swine flu virus

(AP) -- Mexico's health secretary may have thought he was allaying fears about swine flu when he suggested that the nation's swine flu death rate was 6 or 7 percent. In reality, that would mean a monstrous killer virus - and no experts are close to saying that. The secretary's comment reflects how much remains unknown about the new flu virus - most notably how lethal it is and why it seems so much deadlier in Mexico than anywhere else.

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<p><a href="http://www.physorg.com/news160275894.html">Scientists struggle to understand swine flu virus</a></p> <p>(AP) -- Mexico's health secretary may have thought he was allaying fears about swine flu when he suggested that the nation's swine flu death rate was 6 or 7 percent. In reality, that would mean a monstrous killer virus - and no experts are close to saying that. The secretary's comment reflects how much remains unknown about the new flu virus - most notably how lethal it is and why it seems so much deadlier in Mexico than anywhere else.</p>