Grouped in 16 categories, the 2004 Programs in Brief illustrates the scope of Centers for Disease Control and Prevention (CDC) and the Agency for Toxic Substances and Disease Registry (ATSDR) activities, as well as their shared goals of safer, healthier people here and around the world. Each description includes a statement of the public health issue or problem, describes CDC's or ATSDR's activities and accomplishments, and identifies steps for moving forward. This document is organized in the following categories: (1) Forward; (2) Overview; (3) Bioterrorism and Public Health Preparedness; (4) Birth Defects and Developmental Disabilities; (5) Cancer Prevention; (6) Chronic Disease Prevention; (7) Environmental Health; (8) Global Health; (9) Health Promotion; (10) HIV/AIDS; (11) Infectious Diseases; (12) Injury Prevention; (13) Partners in Public Health; (14) Research, Technology, and Data; (15) Training; and (16) Workplace Health and Safety.