Fecal transplants are showing promise of being able to help solve infections and other problems. So we’ll be needing more fecal donors. But not just anyone can donate. “Only about 3 percent make it through our screening process. We like to joke with our donors that it’s easier to get into Harvard or M.I.T. than be a stool donor.” NYT: Do You Have the Right Stuff to Be a Stool Donor?