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    A research group including Frederick National Laboratory scientists has taken an early step toward a universal influenza vaccine that appears to protect against many strains, including the closely watched H5N1 bird flu. Human trials are under way.  Conventional seasonal flu vaccines target the rapidly mutating head of the hemagglutinin (HA) protein on the virus particle, so the vaccine must be…

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    • A new experimental #FluVaccine from @FredNatLab targets the stem portion of the flu virus, which is relatively stable from year to year and common to many flu strains. Learn more about this early step toward a universal #influenza #vaccine. https://t.co/00jJOBlJZa