DEERFIELD, Ill.--(BUSINESS WIRE)--With flu activity winding down in the U.S., Walgreens today announced the top markets (DMAs) and states for flu activity for this season, according to its season-ending Flu Index examining aggregate prescription data from November 2014 through February 2015. The states with the highest rates of influenza, according to the Index, were Oklahoma, Texas, Mississippi, Texas and Tennessee. Portland, Ore., Hartford, Conn. and Boston were the markets with the least amo
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