JESSICA C.E. WILSON: Hi, my name is Jessica C.E. Wilson. I'm from Atlanta. And my question is what do you think are the positive benefits of cloning</s>DNA. ELIZABETH COHEN, CNN MEDICAL CORRESPONDENT: Cloning DNA happened several decades ago, and it was the beginning of what's been called the genetic revolution in medicine. If you can think of anything that has to do with genetics in medicine, whether that's a new test for diagnosing cancer, DNA vaccines, amniocentesis -- all of those started with cloning DNA. If we hadn't cloned DNA, we wouldn't have all these developments. So it's a beginning of a whole new way of thinking about treating diseases. The exciting things about the genetic revolution in medicine is that doctors can go right into the DNA and can actually try to change the DNA or change the proteins that DNA produces to change the pathway of a disease. So it's getting right to the root of a disease to try and change it. And all of that started with cloning DNA. Now of course, what some people worry about is that now that we've cloned DNA and now that we've cloned sheep, what's next -- are we going to clone humans? And that's the big ethical decision that will be coming up in decades to come -- is how far do we want this genetic revolution to go.
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