Moving closer to a rapid-learning health care system.

This Perspective discusses activities that are necessary for developing a rapid-learning health system. Recognition of the central role that patients play in the successful evolution of such a system will help ensure that the goals of the transformation are met. Understanding the trade-offs of using a less controlled form of research to inform health care decision making and making necessary investments in methodology and translation will help secure the success of continuous-learning research. Major public policy interest in promoting health information technology and in getting more value for health care spending creates a framework for moving ahead.