If rare diseases are so rare, why do they matter?
Dr. Ségolène Aymé is the Editor-in-Chief for Orphanet Journal of Rare Diseases. She is the founder of Orphanet, and chair of the Topic Advisory Group on rare diseases at the World Health Organization. Here she talks about Rare Disease Day and why it is so important to have a day dedicated to this, despite the scarcity of the diseases.