What are the signs and symptoms of mad cow disease in humans?

Variant CJD, or vCJD, is the human form of mad cow disease. Its signs and symptoms include:

* Difficulty walking

* Poor balance and coordination

* Tremors

* Personality changes

* Memory problems

* Confusion

* Hallucinations

* Mania

* Depression

These signs and symptoms typically progress rapidly, leading to death within a few months to a few years.