Scientists just discovered a potentially revolutionary treatment for Parkinson's disease. The experimental medicine, which is currently in clinical trials, boosts dopamine production in patients' brain to reduce tremors and improve motor skills.
The drug is one of several "gene therapies" developed in recent years. These medications have the potential to treat -- or even cure -- the world's deadliest diseases by repairing the genetic mutations that caused those ailments.
The one hiccup? Gene therapies come with a hefty price tag -- at least for now.