Frontline, which airs on PBS and KERA-TV (Channel 13), takes a closer look at how Ebola spread through Africa with this interactive map.
Frontline's website states: "Never before has the world seen an Ebola outbreak like the one currently spreading across Africa. Thousands have died, even more have become infected, and with no cure and limited resources at their disposal, health officials are struggling to keep up. From Patient Zero to today, here is a look back at how the outbreak became the worst on record."
Watch this Frontline program on Ebola
"Frontline travels to the epicenter of the Ebola crisis to find out how and why the outbreak has spiraled out of control -- and to track the fight to contain the virus's deadly spread."