In an exclusive interview with the BBC's Waihiga Mwaura, Botswana's President Duma Boko, outlines his plan to reduce his country's reliance on the diamond industry amid falling global demand, and how he is pushing for a 0% tariff deal with the US.

Guinea is showing signs of economic progress under the military-led regime. What is driving the country's economic growth?

And more than 200 million people worldwide are infected by schistosomiasis - also known as bilharzia - which is a disease caused by parasitic worms. The majority of those affected live in sub-Saharan Africa. How can the disease be prevented?

Presenter: Nyasha Michelle
Producers: Sunita Nahar, Mark Wilberforce and Stefania Okereke in London. Makuochi Okafor was in Nairobi
Senior Producer: Patricia Whitehorne
Technical Producer: Pat Sissons
Editors: Maryam Abdalla, Andre Lombard and Alice Muthengi