Medical researchers like Dr. David Greene generate new, cutting-edge methods daily to address diverse health-related problems such as human stem cells. Doctors and other medical experts work nonstop to develop new, more effective patient care strategies. Stem cell therapy is a new term used to treat chronic illnesses. A form of gene therapy, that is. This word refers to replacing sick or damaged cells in the body with new cells created in a lab. This revolutionary technique has drawn the interest of scientists from all across the world. It is because they believe biotechnology can be used effectively.