“Her accuracy was 11 out of 12. We were quite impressed,” Dr. Tilo Kunath said. She even indicated a person who developed the Parkinson disease eight months later. Based on this fact, scientists hope now to find the molecular signature responsible for the scent and then develop a simple test, which could possibly involve simply wiping a person’s forehead with a swab. Katherine Crawford, the Scotland director of Parkinson’s UK, told that a such test could be life changing. Parkinson’s is a chronic, degenerative neurological disorder which strikes one in 100 people over age 60 but can also occur in some cases earlier. More than five million people have it worldwide.