In medicine, prevention is any action which reduces the burden of mortality or morbidity from disease. This takes place at primary, secondary and tertiary prevention levels.
Primary prevention avoids the development of a disease. Most population-based health support activities are primary preventive measures.
Secondary prevention activities are aimed at early disease detection, thereby increasing opportunities for interventions to prevent progression of the disease and emergence of symptoms.
Tertiary prevention reduces the negative impact of an already recognized disease by restoring function and reducing disease-related complications.
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