Core Public Health Functions for New Zealand.
This special article defines the public health principles and core public health functions that are combined to produce the public health services essential for a highly-functioning New Zealand health system. The five core functions are: health assessment and surveillance; public health capacity development; health promotion; health protection; and preventive interventions. The core functions are interconnected and are rarely delivered individually. Public health services are not static, but evolve in response to changing needs, priorities, evidence and organisational structures. The core functions describe the different ways public health contributes to health outcomes in New Zealand and provide a framework for ensuring services are comprehensive and robust.