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If a firm increases its output and finds that its average total cost decreases as a result, this implies that
Reservoirs for Pathogens
Environments or hosts that maintain and allow the transmission of disease-causing organisms.
Immunizations
The process by which a person becomes protected against a disease through vaccination.
Well-Balanced Diet
A diet that contains the correct proportions of carbohydrates, fats, proteins, vitamins, and minerals for optimal health and function.
Epidemic
The rapid spread of an infectious disease to a large number of people within a short period of time, geographically localized.
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