Mapping the human genome led to big advances in diagnosing rare disease. But diagnosis is only the first step in dealing with an illness. So what do you do if your child is found to have a condition that has no treatment? We hear from Michelle Teng, a mother who co-founded a biotech firm called SynaptixBio, that is looking to find the world’s first treatment for a rare neurodegenerative disease. Also in the programme, the Chief Medical Officer at Genomics England, Dr Richard Scott, tells us his hopes for the future of genomics medicine. And Dr Segun Fatumo of the London School of Hygiene and Tropical Medicine, explains why Africa is so important when it comes to genetic research. Presented by Vivienne Nunis and produced by Sarah Treanor. Image: Scientists look at a DNA model. Credit: Getty Images.