As we know, scientists still find a vaccine for HIV/AIDS. To carry out their experiment they cannot help but use man as a sample. Scientists must find a new alternative: "There are many ways to reach the Roma", they found that chimpanzee genes have a similarity between 96% and 98% with humans (WWF,nd). It is the main reason why chimpanzees are used in experiments. The scientist used several chimpanzees to find new medicines, such as the HIV/AIDS vaccine. So far the result has been zero, and many chimpanzees have been killed because of this. We know that to find something new we have to sacrifice something. For example, sacrificing chimpanzees to find a new medicine, but let's think about the future if scientists will use it. Sometimes chimpanzees will become extinct