Mankind is retarded sometimes.

Mad cow disease - caused by cow feed that had sick sheep tissue. That's just plain twisted either way you cut it.

Hepatitis A - strawberries in a field with "inadequate toilet facilities" provided for the workers. Also from shellfish living in waters infested by human waste.

Cause of the illnesses frequently visiting humanity - humanity.

Hoorah for our intelligence. Knowledge obtained courtesy of Rood Fundamentals Edition 9 by Margret McWilliams

On the plus side, Einstein is wayyyyyyy awesome!