Alzheimer's disease can apparently be transmissible - under very rare circumstances. A research team from London claims to have shown that Alzheimer's can be transmitted.
However, one expert finds this assessment “premature’ and says the study is based on only five people. In Alzheimer's disease, the protein amyloid beta is folded incorrectly and clumps together in the brain. Small accumulations arise between the nerve cells, which lead to cognitive decline. There is currently no cure for the neurodegenerative disease, but there is some progress in medications and therapies.