I hope this would help
Research on animals is important in understanding diseases
and developing ways to prevent them. The polio vaccine,
kidney transplants, heart surgery techniques, effective
treatments for diabetes, diphtheria, and other diseases have all
been developed with the help of animal research.
With the help of animal research, smallpox has been wiped out worldwide. Microsurgery to reattach hearts, lungs, and other transplants are all possible because of animal research.
Since the turn of the century, animal research has helped increase our life-span by nearly 28 years. And now, animal research is leading to dramatic progress against AIDS and Alzheimer's disease.
Working with animals in research is necessary. Scientists need to test medical treatments for effectiveness and test new drugs for safety before beginning human testing. Small animals, usually rats, are used to determine the possible side effects of new drugs. After animal tests have proven the safety of new drugs, patients asked to participate in further studies can be assured that they may fare better, and will not do worse than if they were given standard treatment or no treatment.
There is no alternative to animal research. Living systems are complex. The nervous system, blood and brain chemistry, and gland secretions are all interrelated. It is impossible to explore, explain or predict the course of many diseases or the effects of many treatments without observing and testing the entire living system.