Disease Fatality Rates
A simple visualization from David McCandless showing the average fatality rates for major diseases.
It'd be great to see a visualization like this for different populations based on age or region. For example, how would the circles change if we were looking at young people in Haiti? What if we were looking at the same population post-earthquake?
He also created a related visualization that looks at how long these diseases can survive outside the body (main takeaway: wash your hands!)