New twist on a flu vaccine revs up the body’s army of virus killers

A vaccine made with a virus genetically tweaked to be quickly detected lets mice survive a lethal infection

map of flu activity

IT’S HERE  Flu activity is widespread across the county, with 32 states and Puerto Rico reporting high activity (orange to red) as of January 13, according to the U.S. Centers for Disease Control and Prevention.

CDC

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