At time of recording an ongoing Ebola outbreak in Uganda has sickened 64 people. 24 people have died. The outbreak was declared on September 20th in a rural community but has since spread to Kampala, the sprawling capital city.

In recent years, health officials in Africa have become very adept at responding to ebola outbreaks, and have relied on a highly effective vaccine that was developed in the wake of the 2014 West Africa ebola outbreak. However, there is no vaccine for the particular strain of ebola circulating in Uganda today.

In this episode, we speak with John Johnson, vaccine and epidemic response advisor with Doctors Without Boarders France to talk about the origins of this outbreak and how it has spread, how healthcare workers are responding, and why there's not vaccine for this particular strain of Ebola when other ebola vaccines have proven to be so effective.