... goes on further to say that animal experiments can not only mislead researchers but even contribute to illnesses or deaths by failing to predict any toxic effect on drugs. The majority of animals in laboratories are used for genetic manipulation, surgical intervention or injection of foreign substances. Researchers produce solutions from these animal "models" and are adapting them to human conditions. Unfortunately, these animal "models" can't always be connected with the human body thus creating problems. Many times, researchers induce strokes on animals in order to test certain methods for curing. The downfall of this procedure is that a healthy animal that experiences a sudden stroke does not undergo the slowly progressive arterial damage that usually plays a crucial role in human strokes. In another illustration of the inaccuracy of animal research, scientists in the 1960s deduced from many animal experiments that inhaled tobacco smoke did not cause lung cancer. ...

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