Pharmacist Serena Felix, left, administers a flu shot during the Flu + You event at Ellie Towne Flowing Wells Center, sponsored by the National Council on Aging and Sanofi Pasteur on Tuesday, Oct. 8, ... more 
Pharmacist Serena Felix, left, administers a flu shot during the Flu + You event at Ellie Towne Flowing Wells Center, sponsored by the National Council on Aging and Sanofi Pasteur on Tuesday, Oct. 8, 2013, in Tucson, Ari. (Madison Kirkman/ AP Images for National Council on Aging and Sanofi Pasteur) less 
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Associated Press
Wed, Oct 9, 2013 1:02 PM EDT