--Pro1

A main reason we need animals is because they give us a closer result to humans than any other type of test could give us. Thomas Dixon states that "Human beings share 99% of their genes with chimpanzees and only slightly fewer with other monkeys." 99% is a HUGE percentage, and knowing that they are that close, there’s very little room for error. Other tests that are proven to get the job done might work often, but probably won't work near 99% of the time. Animal testing generates useful information about how new drugs would react inside a human body (Shandilya). Knowing this, scientists can predict what's going to happen compared to what happens to an animal. Machines made to test medicines can't react to the medicine, so we won't know what happens with a medicine after a period of time. The machine might say the medicine will be fine for the time, but it may have very bad side effects. If animal testing was made illegal, there would be very little hope to finding new cures to challenging diseases (Shandilya).