Public Health System:  There is a public health system in each community defined as the wide range of public, private and voluntary organizations such as governmental agencies, academia, health care providers, hospitals, community-based organizations, associations, businesses and individuals. The unique function of governmental public health agencies within this broad infrastructure framework is to see that all vital system elements are in place; that all core functions and essential services (see below) are coordinated; and that the mission of improving the health of the community is adequately addressed, using regulation if necessary.

Adapted from The Future of Public Health, Institute of Medicine, National Academy Press, 1988 and http://www.health.state.ny.us/press/reports/century/phc_terms.htm#1

The specific responsibilities of the entire public health system are to:
 Prevent epidemics and the spread of disease
 Protect against environmental hazards and prevent injuries
 Promote and encourage healthy behaviors
 Assure the quality and accessibility of health services
 Respond to disasters and assist communities in recovery 

 Adapted from: Public Health in America, Public Health Functions Steering Committee, US Department of Health and Human Services, 1994 and http://www.health.state.ny.us/press/reports/century/phc_terms.htm#1