Level

Definition

Primary prevention

Primary prevention strategies intend to avoid the development of disease. Most population-based health promotion activities are primary preventive measures.

Secondary prevention

Secondary prevention strategies attempt to diagnose and treat an existing disease in its early stages before it results in significant morbidity.

Tertiary prevention

These treatments aim to reduce the negative impact of established disease by restoring function and reducing disease-related complications.

Quaternary prevention

This term describes the set of health activities that mitigate or avoid the consequences of unnecessary or excessive interventions in the health system.