SOCIAL QUESTIONS|health|illness|epidemic · SOCIAL QUESTIONS|health|medical science|epidemiology
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- outbreak threshold
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- Definition "number of infections required for the outbreak to escape stochastic dynamics" Reference "COM-Terminology Coordination, based on:Hartfield M, Alizon S. 'Introducing the outbreak threshold in epidemiology' (8.5.2020). PLoS Pathog. 2013;9(6):e1003277"
- Comment So far we have only considered homogenous outbreaks, where on average each individual has the same pathogen transmission rate. In reality, there will be a large variance among individual transmission rates, especially if “super-spreaders” are present. This population heterogeneity can either be deterministic, due to differences in immune history among hosts or differences in host behavior, or stochastic, due to sudden environmental or social changes. Spatial structure can also act as a form of heterogeneity, if each region or infected individual is subject to different transmission rates, or degree of contact with other individuals