Why Is Animal Testing Justified

Animal testing, also known as animal experimentation, is the use of animals to view and control variables that affect their behavior and biology system. It has played a major role in biomedical research ever since the last century. Using animals in research that could protect humans from a disease, any kind of pain, suffering, and even death should be justified.
One of the many reasons why it is justified is because it has helped medical fields come up with many treatments for diseases. Treatments such as chemotherapy for cancer, Vaccine against smallpox, insulin is now available to control diabetes, it has even helped perfect kidney transplants, and there are many other examples. The smallpox vaccine was obtained from Edward Jenner who