Prions are a new concept in medicine and biology. The concepts about α-helix, β-sheet, peptide bond, hydrogen bonds are discussed. Prion diseases cause fatal zoonotic transmissible spongiform encephalopathy, Alzheimer, Huntington and Parkinson diseases in animals and humans. The earliest known Prion disease is Scrapie. Kuru is a fatal neurodegenerative disorder caused by abnormally folded Prion proteins, which leads to symptoms as tremors,...