The three core functions of public health, as defined by the National Institutes of Health in 1998, are assessment, assurance, and policy development. These include:
Assessment
Monitoring health status in order to identify health issues within the community
Investigation/diagnosis of health issues and hazards within the community
Evaluation of the effectiveness, accessibility, and quality of the health services within the community
Assurance
Assures that the community can count on a competent public and personal care workforce
Links people to personal health services and provides these services and health care when it is otherwise not available (e.g., public health clinics)
Informs and educates people about health issues and empowers them to take control of their own health
Mobilizes community partnerships in order to identify and solve health provlems
Policy Development
Develop policies and plans that support health efforts on both individual and community levels
Enforce laws and regulations that protect health and ensure safety
Research new insights and innovate solutions to health problems
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