A CDC Framework for Preventing Infectious Diseases: Sustaining the Essentials and Innovating for the Future (CDC's ID Framework) was issued in October 2011 as a roadmap for improving our ability to prevent known infectious diseases and to recognize and control rare, highly dangerous, and newly emerging threats. Although its primary purpose is to guide CDC's infectious disease activities, the document was also designed to guide collective public health action at a time of resource constraints and difficult decisions, while advancing opportunities to improve the nation's health. This Progress Report is intended to provide a brief update on the status of CDC's work since October 2011 to advance the three elements of the ID Framework: Strengthe...