[coding123]

4 paragraphs down in the main article talks about this. Yeah they don't "jump" if that's your concern. But have you ever licked your fingers without washing your hands? Are you a hunter that might have deer blood on your hands?

[hannasanarion]

Doesn't have to be blood, you can just eat the stuff. That's how mad cow disease spreads to humans. Cooking doesn't kill prions.