Dr. Michael Osterholm on effectiveness of flu vaccine

Michael Osterholm
Michael Osterholm, Director of the Center for Infectious Disease Research and Policy at the University of Minnesota, appeared on the Midday program at Minnesota Public Radio in St. Paul, Minn. on Thursday, Oct. 27, 2011.
MPR Photo/Tim Post

A new study led by University of Minnesota researchers shows that annual flu shots protect only about 59 percent of the population. How good are vaccines, and how important to public health?

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