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Epidemiology of Disease

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Epidemiologic Triad<br />

Agent<br />

Environment<br />

Host<br />

Recognizing the components <strong>of</strong> the triad is critical to<br />

control infectious disease<br />

A variety <strong>of</strong> opportunities to reduce disease at multiple<br />

points in the transmission cycle<br />

A common mistake is to focus on only one area for disease<br />

control or prevention and to overlook the others

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