How to slow down Ebola

The phylogenetic tree of the 2013-2016 Ebola epidemic doesn't just show how the Ebola virus was able to evolve: it also reveals which events and preventive measures accelerated or slowed down its spread, opening up new perspectives for the containment of epidemics.

Crucial test of Ebola vaccine raises hopes, doubts in Congo

Even if the vaccine helps, there are serious hurdles. The shots must be transported deep into forests with few paved roads without it spoiling in the heat, and health workers must identify and track down anyone who's had contact with a sick person and persuade them that shots pushed by foreigners could save their lives.