Back in the 1930s, 40s and 50s, polio epidemics were a regular and frightening feature of summertime in the U.S. The invention of the polio vaccine drastically reduced the number of people afflicted with this virus, but those who survived may have consequences decades after recovery. What do we know about the delayed effects of polio? Can our knowledge of polio shed any light on other infections such as West Nile virus? Guest: Richard Bruno, HD, PhD, Director of the Post-Polio Institute and author, The Polio Paradox