Blood is capable of passing many diseases and sicknesses so washing your hands is good for the doctor and the patient to deter any germs, and putting on gloves is good for the doctor and patient to not pass diseases through open sores or cuts on each other :D
At this time no treatment has been shown to slow or stop the progression
of Parkinson's disease. Treatment is therefore symptomatic. There is no
standard or "best" treatment for Parkinson's disease. A number of
treatment approaches help patients with Parkinson's disease.