术语信息
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Prevalence is sometimes defined as a proportion with total population size in the denominator. A particular instance of infectious disease prevalence will depend on a type of infectious disease, a population, and a period of time. Actual measures of prevalence are based only on reported cases and usually specify a time interval and geographic location. Other constraints may include population demographics.
definition
A quality that inheres in an organism population and is the number of realizations of an infectious disease in the population at a specified time.