The severe flu season

Dr. Marc Siegel, assistant professor of medicine at the George Washington University School of Medicine and Health Sciences, joins Bill Leff to review the severe flu season.


Dr. Kimbra Bell, left, administers a flu vaccine Friday, Jan. 4, 2013 to patient Christine Scully, of Chicago, who decided to get the shot during an appointment at Northwestern Memorial Hospital. (Chris Walker/Chicago Tribune)


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