Juana Martinez, front left, prepares for her flu shot during the flu shot clinic at the Armory Park Senior Center in Tucson, Ariz., Thursday, Oct. 4, 2012. This clinic is part of the Flu + You initiative to educate 65 and older adults about the available flu vaccine options. (John Miller/AP Images for NCOA)

Associated Press
Juana Martinez, front left, prepares for her flu shot during the flu shot clinic at the Armory Park Senior Center in Tucson, Ariz., Thursday, Oct. 4, 2012. This clinic is part of the Flu + You initiative to educate 65 and older adults about the available flu vaccine options. (John Miller/AP Images for NCOA)
Juana Martinez, front left, prepares for her flu shot during the flu shot clinic at the Armory Park Senior Center in Tucson, Ariz., Thursday, Oct. 4, 2012. This clinic is part of the Flu + You initiative to educate 65 and older adults about the available flu vaccine options. (John Miller/AP Images for NCOA)
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