Final answer:
Prion diseases are degenerative neurological diseases caused by misfolded proteins called prions. Examples of prion diseases include Huntington's chorea, fatal familial insomnia, and scrapie.
Step-by-step explanation:
Prion diseases are degenerative neurological diseases caused by misfolded proteins called prions. They can affect both humans and animals. Examples of prion diseases include Huntington's chorea, fatal familial insomnia, and scrapie. So, the correct answer is All of the above.