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Home NEWS Science News Health

“Winter is coming”: The influence of seasonality on pathogen emergence

Bioengineer by Bioengineer
July 21, 2020
in Health
Reading Time: 2 mins read
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Credit: Sylvain Gandon

Seasonal fluctuations drive the dynamics of many infectious diseases. For instance, the flu spreads more readily in winter. Two scientists from the University of Nantes* and the CNRS** in Montpellier have developed a mathematical model to predict the risk of the emergence of an epidemic, depending on the time of the year at which the pathogen is introduced. Their theoretical predictions, which accounts for random factors acting on the birth and death rates of the pathogen, highlight an interesting temporal dynamic when these pathogens have a “winter” period. This is not necessarily the season of the same name, but a period which is less favourable to them (when the birth rates is lower than the death rate). According to their research, a pathogen introduced just before this “winter” has a much lower probability of escaping extinction and causing a large epidemic. The scientists have called this the “winter is coming” effect. Their theoretical model, it is thought, will make it possible to develop better strategies to act on seasonal epidemics. Intervention at the right time could amplify this effect and would thereby generate unfavourable conditions for the emergence of an epidemic.

This research is published in PLOS Computational Biology.

###

Notes

*Philippe Carmona belongs to Laboratoire de mathématique Jean Leray (CNRS / Université de Nantes).

**Sylvain Gandon works at Centre d’écologie fonctionnelle et évolutive, CEFE (CNRS/ Université de Montpellier/IRD/EPHE/Université Paul-Valéry-Montpellier).

Media Contact
Clara Barrau
[email protected]

Original Source

http://www.cnrs.fr/en/winter-coming-influence-seasonality-pathogen-emergence

Related Journal Article

http://dx.doi.org/10.1371/journal.pcbi.1007954

Tags: Algorithms/ModelsEpidemiologyMathematics/StatisticsMedicine/Health
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