For the first time, doctors have watched a treatment slow the course of Huntington’s disease in people, instead of just easing symptoms. In a small international trial, people who received an experimental, one-time treatment called AMT 130…

For the first time, doctors have watched a treatment slow the course of Huntington’s disease in people, instead of just easing symptoms. In a small international trial, people who received an experimental, one-time treatment called AMT 130…