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Journal ArticleDOI

Population biology of infectious diseases: Part II

Robert M. May, +1 more
- 02 Aug 1979 - 
- Vol. 280, Iss: 5722, pp 455-461
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TLDR
Consideration is given to the relation between the ecology and evolution of the transmission processes and the overall dynamics, and to the mechanisms that can produce cyclic patterns, or multiple stable states, in the levels of infection in the host population.
Abstract
If the host population is taken to be a dynamic variable (rather than constant, as conventionally assumed), a wider understanding of the population biology of infectious diseases emerges. In this first part of a two-part article, mathematical models are developed, shown to fit data from laboratory experiments, and used to explore the evolutionary relations among transmission parameters. In the second part of the article, to be published in next week's issue, the models are extended to include indirectly transmitted infections, and the general implications for infectious diseases are considered.

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Citations
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Analysis and Dynamics of Fractional Order Covid-19 Model with Memory Effect

TL;DR: In this paper, the authors examined fractional order Covid-19 model by employing an efficient and powerful analytical scheme termed as q-homotopy analysis Sumudu transform method (q-HASTM).
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The Cloacal Microbiome Changes with the Breeding Season in a Wild Bird.

TL;DR: It was found that the cloacal bacterial communities differed between the sexes when they were in breeding condition, and in males, but not in females, the bacterial community became more diverse with the onset of reproduction, and then decreased in diversity as males transitioned to non-breeding condition.
Proceedings ArticleDOI

Diffusion Centrality in Social Networks

TL;DR: A new notion of diffusion centrality (DC) is proposed in which semantic aspects of the graph, as well as a diffusion model of how a diffusive property p is spreading, are used to characterize the centrality of vertices.
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Social prophylaxis through distant corpse removal in ants.

TL;DR: It is suggested that ants use distance to the nest rather than other occupancy cues to limit sanitary risks associated with dead nestmates, and this study investigates how Myrmica rubra workers manage to reduce encounters between potentially hazardous corpses and nestmates.
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The occurrence of lice on sea trout (Salmo trutta L.) captured in the sea off the East Anglian coast of England

TL;DR: The results of a sampling programme for salmon lice on sea trout caught in the North Sea off the East Anglian coast during 1992 and 1993 are compared with similar data from 1972 and 1973 for fish caught on the coast of Yorkshire.
References
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Journal ArticleDOI

A contribution to the mathematical theory of epidemics

TL;DR: In this article, the authors considered the problem of finding a causal factor which appears to be adequate to account for the magnitude of the frequent epidemics of disease which visit almost every population.

A Contribution to the Mathematical Theory of Epidemics.

TL;DR: The present communication discussion will be limited to the case in which all members of the community are initially equally susceptible to the disease, and it will be further assumed that complete immunity is conferred by a single infection.
Journal ArticleDOI

The Natural Regulation of Animal Numbers

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