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Global alarm as killer swine flu spreads
Published:  Apr 26, 2009 11:59 PM
Updated: Apr 27, 2009 9:09 AM

World health officials Sunday stepped up the battle against a new swine flu blamed for dozens of deaths in Mexico, as the US declared a public emergency amid signs the disease was spreading.

The United States will screen visitors arriving from infected areas, Homeland Security Secretary Janet Napolitano said, as 20 cases were confirmed in five states.

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