Health Officials Keep Close Watch on Bird Flu An especially virulent strain of the bird flu has spread from Asia to Europe and Africa. Known as H5N1, the virus can infect humans as well as birds. World leaders and health officials are taking the threat of a pandemic seriously, and pressure is on to develop effective containment measures and treatments.

Sifting Through Official Speak on Bird Flu

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Migrations Complicate Efforts to Thwart Bird Flu

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Mortalities from a Flu Pandemic Hard to Predict

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Vaccine Production May Fail in Flu Pandemic

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Vietnam, Hardest Hit by Bird Flu, Steps Up Fight

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China Reports First Human Death from Bird Flu

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China Confirms First Human Bird-Flu Cases

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Flu-Vaccine Shortages and Distribution Delays

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Roche Makes Assurances on Tamiflu Supply

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Quicker Turnaround for Flu Tests

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Examining the Federal Flu Plan

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Vietnam Takes Steps to Head Off Flu Pandemic

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New York City Tests Mass Flu Vaccination

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