For the 10 million people living with Parkinson's disease around the world, diagnosis might have come too late. Today, a patient can only be diagnosed with the degenerative disease after receiving a a number of tests and ruling out all the other possible diseases, at which point many brain cells have already been lost. If the disease were diagnosed earlier, doctors might be able to intervene and slow the progression of the disease. Now researchers from La Trobe University in Australia have developed a diagnostic blood test for Parkinson's, according to a press release. Thanks to a grant from the Michael J. Fox Foundation for Parkinson's Research, the test might make its way to clinical use in the next five years. If it were to do so, it would be the world's first blood test for Parkinson's.