Ebola
Ebola may have spread beyond Africa. How are health authorities responding?
Three experts explain how the rare Bundibugyo strain of Ebola may have crossed continents.
What’s wrong with how US and Uganda plan to stop Ebola spreading
Geography may not provide meaningful protection once an outbreak is already underway.
What you need to know about the Ebola outbreak that has the WHO concerned
While other forms of Ebola can be prevented with a vaccine, none are currently available to prevent this rare strain.