** FILE ** Syringes filled with an influenza vaccine are piled in a container at Rocky Mountain Primary Care's Thornton, Colo., location, in this, Oct. 26, 2006, file photo. (AP Photo/Jack Dempsey, File)

Photo by: JACK DEMPSEY

** FILE ** Syringes filled with an influenza vaccine are piled in a container at Rocky Mountain Primary Care's Thornton, Colo., location, in this, Oct. 26, 2006, file photo. (AP Photo/Jack Dempsey, File)