Jessica's homework(one paragragh)

Animal test is not the best method for people to test new drug and it should be replaced .The problem of this method is that the test result of animal isn’t exactly same as human ,which will lead to potentially dangerous ,because it is a fact that there is many difference between animal and humans in the physical structure .Even though the result show that the new drug is safe ,it is just for animal but not for human. However,some scientists state that there is no differences in lab animal and humans, so it is no need to worry about adverse reactions for humans different from animal.This concludion is right to a certain extent ,but at the current medical standards it is too early to define it.As you see animal test have many uncertainties and also it is hard to solve .So it is not a wise choice.In fact,there are some alternatives invented successful now such as human tissue sample and even computer models and programmes.We can completely use them instead of animal test to solve the difference and give a more accurat testing result.