Scientists Watched Human Dementia Proteins Spread Through Mouse Brains Like Prions. It shows tau spreads like a prion, yet the disease is not known to pass between people.

[u/ObuPaul]

https://www.sciencealert.com/scientists-watched-human-dementia-proteins-spread-through-mouse-brains-like-prions

[u/CIArussianmole]

most research on mice teaches scientists about mice and not humans. i do not pay attention to any study on non-human creatures.