Do you feel pesticides in produce, hormones in milk, and antibiotics in meat have any link to diseases such as cancer, autism, or attention deficit/hyperactivity disorder (add/adhd)?

No, but i do feel they are very unhealthy, your body doesn't know how to process the chemicals in the pesticides and the hormones in milk aren't healthy for the cows that give the milk or the people that drink it.

Blood transfusions were rarely done and often fatal; they were outlawed until the nineteenth century.