Pbs Learning Media: Spillover Zika, Ebola & Beyond: Part 5: Contact Tracing

Find out why contact tracing is such a crucial part of controlling outbreaks of infectious disease. Tracing back to patient zero during the West African Ebola outbreak shed light on Ebola's zoonotic origins and rapid spread. Contact tracing revealed that one initial "spillover" event-contact between a Guinean child and a bat in 2015-resulted in the largest Ebola outbreak the world had ever seen. [4:23]