Three Levels of Prevention
Updated 2026-08-10
INTRODUCTION
English translation pending.
CORE DEFINITION
A framework from public health that separates intervention into three levels: primary prevention, which stops a problem from occurring at all; secondary prevention, which detects and treats it early; and tertiary prevention, which reduces the impact of an established condition and prevents recurrence. Its core proposition is that the cost of intervention rises and its return falls as the problem advances, so resources should be weighted toward the earliest feasible stage. The qualifier is that the model presumes a definable timeline from cause to harm.
SCAFFOLDING EFFECT
Reduce cognitive load
- Stage placement: determine whether the problem has not occurred, is early, or is already established. - Layer match: apply primary, secondary, or tertiary measures according to that stage. - Budget shift: move resources upstream toward primary prevention to cut downstream load.
Anchor fast decisions
Problems develop along a timeline from cause to harm, and the earlier a cause is blocked the fewer downstream consequences have to be handled. Primary prevention removes the cause outright, secondary catches damage while it is still cheap to reverse, and tertiary limits loss once reversal is impossible, so the return on each unit of effort declines as the stage advances.
MINIMUM ACTION
In progress 0/1Practice this model in one real situation:
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Source support: Explicit
- en.wikipedia.orghttps://en.wikipedia.org/wiki/Preventive_healthcareverified
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