Final answer:
Prevalence vs. Incidences, CDC Data on Diseases, Demographic Impact on Epidemiological Population
Explanation:
Prevalence of a disease at a particular time may not be equal to the sum of the incidences due to factors like duration of the disease, recovery rates, and population changes.
Publication like the CDC provides data on emerging/reemerging diseases in the United States.
An epidemiological population in a state may differ in size from the actual population due to demographic factors. For instance, the presence of a significant number of tourists in a state could impact the epidemiological population size.
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