Alzheimer’s disease is a member of an aggressive family of neurodegenerative diseases known as transmissible spongiform encephalopathy (TSE). The operative word is “transmissible.”

TSEs are caused by a deadly protein called a prion (PREE-on). Prion disease is unstoppable. The pathogen spreads through the bodily fluids and cell tissue of its victims. Blood, saliva, mucus, milk, skin, urine and feces carry deadly prions from the victim. All tissue and all bodily fluids are infectious. A cough, sneeze or contaminated utensil can be lethal.

https://alzheimerdisease.tv/alzheimers-disease-caregivers /">Caregivers - Alzheimer's Disease (archive.org)