Why are there concerns of ethnic cleansing in Darfur?

Human Rights Watch says ethnic cleansing has taken place in El Geneina against the Massalit and non-Arab residents. What's the evidence? Also, after more than three billion doses, the Oxford-AstraZeneca Covid vaccine won't be manufactured anymore. Why is that, and how will this affect future vaccine uptake in Africa?And we explore attitudes to twins from Igbo Bora, a small rural community in southwest Nigeria which has an extraordinarily high number of them!Presenter: Audrey Brown Producers: Bella Hassan, Victor Sylver, Charles Gitonga and Rob Wilson Senior Producer: Karnie harp Technical Producer: Jonathan Greer Editors: Alice Muthengi and Andre Lombard