Mad Cow Disease is a fatal brain disease that cows get from eating chunks of the spine of dead infected cows. The symptoms are similar to Alzheimers, because the brain basically turns into a useless sponge. People then eat the cows, or inhale particles that had been in the cows, and you know what happens? They die. The people die because conservatives made cows eat cows.
Many people ask: How the hell did this become such a big problem!? Well, because of conservatives and their evil greed. Feeding dead cows to living cows was profitable.