23 March 2015 Last updated at 16:44 GMT
As part of the BBC’s A Richer World season, renowned Swedish statistician Hans Rosling discusses how West Africa has managed to contain the Ebola virus.
Exactly one year ago, on 23 March 2014, the World Health Organisation officially declared an Ebola outbreak in West Africa.
The Ebola crisis swept through the region, particularly Sierra Leone, Liberia and Guinea.
But Prof Hans Rosling, a professor of global health at the Karolinska Institutet, argues that the crisis demonstrates just how far Africa has come in terms of development considering how it has managed to battle back against the outbreak.