How is animal testing accurate if animals are different from humans?

animal testing helps scientists to both cure and invent medicines and products to help both humans and animals.vaccinations for animals are tested and when perfected, help animals to live longer and healthier testing on animals benefits humans for both cosmetic and medicinal reasons, moreso medical. cures for many diseases and preventions have been uncovered through animal testing i am in support of animal testing as long as it is for gain, what is wrong with it? the natural order of things is man over beast and i belive that is the way things should remain.