Fascinating stuff: New brain disease

Stanley B. Prusiner: Nobel Laureate and Team Discover New Infectious Brain Disease
A new prion, or abnormal protein, has been found to cause multiple-system atrophy, according to a National Academy of Sciences report. This is the first new type of prion discovered in 50 years.
New Prion Disease Raises Questions About Whether Alzheimer’s And Parkinson’s Could Be Infectious