Chemistry has contributed many of the life-saving breakthroughs in health and medicine in the last century that allow us to live longer, happier, and healthier. Throughout much of human history, medicine and health care was primitive. If people became sick or injured, doctors could do little more than comfort them and keep them clean. The last 100 years have revolutionized the way that doctors heal patients by curing disease, repairing injuries, and even preventing health problems before they occur. Hard-working chemists and chemical engineers have helped to found modern medicine by developing novel pharmaceuticals, creating new medical equipment, and refining diagnostic processes. Millions of human lives have been saved and improved by the health and medical advances developed through chemistry.