Prevention--how misuse of a concept undercuts its worth.

Some health leaders and researchers have launched mass prevention programs without sound biomedical groundwork. They have oversold the benefits of prevention and underestimated the secondary effects. Some have forced nonmedical concerns into the medical model. Others have blurred the distinctions between prevention and other measures such as screening or therapy. Some have transferred responsibility for disease to the victim. A few have imputed magical powers to certain symbols of prevention, in order to create an illusion of control.