News flash: What we eat can play a pivotal role in warding off — or treating — disease and enhancing quality of life. You may already believe this, and certainly mounting evidence supports that idea. But on the cluttered shelf of diets claiming top health benefits, which one…

By fighting off pathogens, the specialized cells of our immune systems help to keep us healthy and free of infectious diseases. Immunotherapies teach those same cells to recognize and destroy cancer. The drugs have been remarkably successful in treating melanoma — a type of skin cancer — as…