The Scientific Program Committee for the 2012 USPHS Scientific and Training Symposium invites officers to submit an abstract for presentation at the Symposium, which will be held June 19 through 21, 2012 at the University of Maryland, College Park, in the Washington, DC. The theme for the 2012 Symposium is Prevention Strategies for a Healthy Nation: Building on the Basics of Public Health. The deadline for submissions is December 21, 2011.