Only about one in four Americans aged 50-64 regularly takes advantage of preventive health services such as screenings and immunizations, according to a report released today by the Centers for Disease Control and Prevention. The report identifies recommended prevention services and model programs, policies and strategies that communities can adopt to promote broader use of these services in this age group, which will comprise 20% of the nation's population by 2015. The resource was produced in collaboration with the American Medical Association and AARP.