Abstract
IN general an epidemic process can be characterized as a time-dependent process of transition by the members of a population, where the state transitions are caused by exposure to some influence called infectious material. The members of the population can belong to one of three basic states at a given point in time: (a) Infective, those members of the population who are host to the infectious material; (b) Susceptible, those members of the population who can become infectives given effective contact with infectious material; (c) Removal, those members of the population who have been removed from circulation for one of a variety of reasons such as death, immunity, hospitalization, etc.
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References
Bailey, N. T. J., The Mathematical Theory of Epidemics (Griffin, 1960).
Bartlett, M. S., Stochastic Population Models in Ecology and Epidemiology (John Wiley, 1961).
Goffman, W., and Newill, V. A., Nature, 204, 225 (1964).
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GOFFMAN, W. An Epidemic Process in an Open Population. Nature 205, 831–832 (1965). https://doi.org/10.1038/205831a0
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DOI: https://doi.org/10.1038/205831a0
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