File photo dated 21/03/13 of a nurse handling a syringe at a medical centre in Ashford, Kent as British scientists have edged closer to developing a "holy grail" universal influenza vaccine that would... more 
File photo dated 21/03/13 of a nurse handling a syringe at a medical centre in Ashford, Kent as British scientists have edged closer to developing a "holy grail" universal influenza vaccine that would tackle all strains of the illness. less 
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Sun, Sep 22, 2013 6:05 PM EDT