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MAKING THE MODERN WORLD
Stories about the lives we've made

module:Geography of health

Patterns of disease

page:The Bartlett model

The Bartlett model examines the ways in which a disease can be endemic or, in other words, remain in a population as a ‘reservoir’ of infection.

Using measles as an example, Bartlett found that below a threshold level of 250,000, measles would die out completely. New epidemic waves would only be made possible by the arrival of infected immigrants.

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