Animal experimentation is a scientifically invalid practice because data from animal studies are not reliable. Over 3 million animals have been abused and killed all in the name of science. It has been found that only 5%-25% of side effects caused by medicines is accurately predicted. This leads us to wonder what is actually being gained from animal experimentation? Animals make inaccurate models for studying human diseases because molecular biology has revealed significant differences between species on the cellular level; therefore it sidetracks medical progress and wastes time, talent and resources. Animal rights activists focus their arguments mainly on the differences between the physiology of humans and other animals, providing the answer to why human reactions to illnesses and drugs are completely different from those of other animals. They are trying to get people to understand that just because a drug works on rats and doesn't hurt them, does not mean it will work on humans, and vice versa. These differences can even be deadly if the results of animal testing are applied to human medical treatment.
             Many of the organizations demonstrate cases of how animal testing has failed.
             1.SIAV gives an example of the research for the polio vaccine. Although those who promote vivisection often cite the polio vaccine to support animal experimentation, the truth is more complicated. Salk and Sabin, who are usually credited with the polio vaccines, tested on monkey tissues, and the results had these scientists believe that polio enters only through the nose. It was later discovered polio entered through the mouth to the intestines. This apparently set back research drastically. "Sabin himself made an impressive argument against vivisection when he testified to the House Committee on Veterans Affairs in 1984 saying: 'Work on prevention [of polio] was delayed by an erroneous conception of the nature of the human disease, based on mislead...