Even opponents of cloning probably agree that the Weldon bill passed in July by the U.S. House of Representatives is extreme. It not only bans federal support for human cloning but criminalizes the activity and prohibits traffic in any products or services arising from it. It deliberately makes no distinction between reproductive cloning (aimed at producing new people) and therapeutic cloning (aimed at creating cell lines for medical treatments). The bill sends a message: "No human cloning, ever."
Cloning technology is highly inefficient; cloned cells show puzzling irregularities; a cloned child would be raised in a psychologically murky environment. For all those reasons, responsible biologists agree with putting off reproductive cloning for the good of the clones. But they plead that therapeutic cloning is too promising to discard blindly.