Could it be this easy!?
 

Very interesting,

Scientists are trying to treat Parkinson's disease with blood from young people | Daily Mail Online

From a PubMed search for "Wyss-Coray" all that I can find is this, which is concerned with Alzheimer's Disease not PD.

It was a feasibility study but this approach could also help with PD.

Safety, Tolerability, and Feasibility of Young Plasma Infusion in the Plasma for Alzheimer Symptom Amelioration Study: A Randomized Clinical Trial. - PubMed - NCBI

See badboy's thread. Nan Cyclist describes her experiences.

https://www.neurotalk.org/parkinson-...ighlight=blood

John