What is the chief distinction between the levels of prevention in the Leavell and Clark model of health protection?

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The Leavell and Clark model distinguishes between three levels of prevention: primary, secondary, and tertiary. The chief distinction between these levels is the point in the disease process at which they occur. Primary prevention aims to prevent the onset of disease by targeting risk factors before symptoms appear. Secondary prevention aims to detect and treat disease early in its course, before it causes significant morbidity or mortality. Tertiary prevention aims to manage and reduce the impact of established disease on the individual and society.

What Is the Chief Distinction Between the Levels of Prevention