Thanks Avis Favarro -CTV for this link. Interesting study on early diagnosis of Parkinson’s.
https://www.ctvnews.ca/health/super-smeller-grandma-helps-researchers-identify-parkinson-s-odour-1.4343603

Researchers in the U.K. have been able to identify the specific compounds that make up an odour associated with people with Parkinson’s disease, thanks to the help of a grandmother who can smell the disease.