A case for cannibalism in society

[Anomalocaris]

That right there is a damn good way of taking a disease that killed one person and spreading it to several more.

That's why you cook it first.

Prions will laugh at cooking. In fact, prions' invulnerability is the basis of its harmfulness - cell in your body has no way to destroy or get rid of it. It is also the reason for its transmissibility - it will survive just about any form of food preparation, cleaning or sterilization.

Look up "Kuru disease" for the link between transmissible prion diseases and cannibalism.