Growing concern over polio numbers

by Tom Crann, Minnesota Public Radio

Polio is once again in the news, with the recent cases in an Amish community in Minnesota uncovered last month. there is growing concern about the number of polio cases worldwide, and the goal of halting the spread of the disease worldwide has been put off another 12 months. The University of Minnesota's Dr. Jon Hallberg talked about fighting polio with MPR's Tom Crann.