By definition, an orphan disease affects a small percentage of the population. However, with some 7,000 such conditions identified so far, they collectively have a significant impact on global health. An estimated 350 million people are affected worldwide by a rare disease — altogether more than the population of the world’s third largest country (the United States). Some well-known biopharmaceutical companies are devoted to developing treatments for rare diseases. However, the vast majority of such diseases have no treatments approved by…