Researchers in medical science have benefited mankind immensely. Medical science provides remedies, cures and safeguards man against various disease, different countries have different systems of medicine. Ayurveda, Homeopathy, Acupuncture, Acupressure etc. are becoming popular today. Diseases like cholera, polio, malaria, pox etc. have almost been eradicated. Once considered incurable, disease like cancer and tuberculosis can be cured today. Organ transplants, brain surgeries, use of artificial limbs and organs, genetic engineering and cloning can be done easily. Medical science also lays emphasis on cleanliness and a balanced diet. It has its negative sides also but those can be taken care of. In fact, medical science has made life healthier, happier and longer than before.