More Than 40 States See Widespread Flu Infection

Aired: 1/9/2013 | 0:05:58 | Clip
Last year, cases of influenza were at extremely low levels, but the virus has returned with a vengeance. Gwen Ifill talks to Dr. Julie Morita of the Chicago Health Department and Dr. William Schaffner of Vanderbilt University about the current flu outbreaks, hitting cities like Chicago and Boston particularly hard.