Current clinical diagnostic accuracy for early-stage Parkinson’s disease is reasonably poor at around 50-70%.
Scientists at Iowa State University have discovered, what appears to be a much more accurate and sensitive early-detection test.
By focusing on detection of key proteins known to be linked to Parkinson's, and very early-stage detection, scientists are hopeful new treatments may found to slow the onset of severe symptoms, or perhaps one day stop them all together.
https://newatlas.com/medical/skin-test-parkinsons-high-accuracy-early-trial/?