Ebola: how does contact tracing work?

The Democratic Republic of Congo says the death toll linked to its latest Ebola outbreak has risen to 131, with 513 suspected contacts now being monitored across six health zones, as the government races to contain the spread of the Bundibugyo variant of the virus. And, with global fuel supply shortages, there are renewed calls for African investments in energy and infrastructure. We speak to Nigerian investor, Tony Elumelu. Presenter: Nkechi Ogbonna Producers: Ayuba Iliya, Keikantse Shumba, Bella Twine and Rukia Bulle Technical Producer: David Kinyanjui Senior Producer: Charles Gitonga Editors: Priya Sippy and Maryam Abdalla