HMM: Alzheimer’s Might Be Transmissible in Similar Way as Infectious Prion Diseases, Research Suggests. “Researchers injected the brain tissue of a confirmed Alzheimer’s patient into mice and compared the results to those from injected tissue of a control without the disease. None of the mice injected with the control showed signs of Alzheimer’s, whereas all of those injected with Alzheimer’s brain extracts developed plaques and other brain alterations typical of the disease.”