A public health nurse demonstrates drawing flu vaccine from a bottle at 

A public health nurse demonstrates drawing flu vaccine from a bottle at the Oklahoma City-County Health Department in Oklahoma City, Thursday, Jan. 10, 2013. Flu season in the U.S. has struck early and, in many places, hard. The Oklahoma State Department of Health reports a sharp increase in the number of confirmed flu cases and the number of flu-related deaths in the past week. (AP Photo/Sue Ogrocki)
Associated Press
A public health nurse demonstrates drawing flu vaccine from a bottle at the Oklahoma City-County Health Department in Oklahoma City, Thursday, Jan. 10, 2013. Flu season in the U.S. has struck early and, in many places, hard. The Oklahoma State Department of Health reports a sharp increase in the number of confirmed flu cases and the number of flu-related deaths in the past week. (AP Photo/Sue Ogrocki)
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