Science journalists Jon Cohen, Carl Gierstorfer explain how, why diseases spread

On Wednesday’s St. Louis on the Air , producer Alex Heuer talked with science journalist Jon Cohen, a staff writer for Science Magazine, and documentary filmmaker Carl Gierstorfer about their work on HIV, AIDS and Ebola. Both have received support from the Pulitzer Center for their reporting projects. Their work takes a look at the causes of diseases, the factors that allow them to spread and the stories of those impacted.