" from a research point of view , this is the first event we could recognize what appears to be typical d ' s condition situations before people build symptoms , " says mayo clinic neuroscientist matthew farrer . " we know if another inherits the trait they are due to get cluster ' s status . " the virus was discovered by refining the lrrk2 mutant in families with parkinson ' s from the us , norway , france and germany .
A genetic mutation has been linked with Parkinson's disease.