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Zika Virus: Endemic Versus Epidemic Dynamics and Implications for Disease Spread in the Americas

Sharon Bewick, William F. Fagan, Justin Calabrese, Folashade Agusto
doi: https://doi.org/10.1101/041897
Sharon Bewick
1Department of Biology, University of Maryland, College Park, MD 20742;
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William F. Fagan
2Conservation Ecology Center, Smithsonian Conservation Biology Institute, Front Royal, VA 22630;
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Justin Calabrese
2Conservation Ecology Center, Smithsonian Conservation Biology Institute, Front Royal, VA 22630;
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Folashade Agusto
3Department of Ecology and Evolutionary Biology, University of Kansas State, Lawrence, KS 66045;
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  • For correspondence: fbagusto@gmail.com
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Abstract

Since being introduced into Brazil in 2014, Zika virus (ZIKV) has spread explosively across Central and South America. Although the symptoms of ZIKV are generally mild, recent evidence suggests a relationship between prenatal exposure to ZIKV and microcephaly. This has led to widespread panic, including travel alerts and warnings to avoid pregnancy. Because ZIKV is an emerging disease, response efforts are complicated by limited understanding of disease dynamics. To this end, we develop a novel state- and class-structured compartment model for ZIKV. Our model shows that the risk of prenatal ZIKV exposure should decrease dramatically following the initial wave of disease, reaching almost undetectable levels in endemic systems. Our model also suggests that, depending on ZIVK transmission levels in the Americas, efforts to reduce ZIKV prenatal exposures through mosquito management and avoidance may have minimal benefit, and may even result in increased risk of microcephaly in later years of an outbreak.

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The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-ND 4.0 International license.
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Posted March 07, 2016.
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Zika Virus: Endemic Versus Epidemic Dynamics and Implications for Disease Spread in the Americas
Sharon Bewick, William F. Fagan, Justin Calabrese, Folashade Agusto
bioRxiv 041897; doi: https://doi.org/10.1101/041897
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Zika Virus: Endemic Versus Epidemic Dynamics and Implications for Disease Spread in the Americas
Sharon Bewick, William F. Fagan, Justin Calabrese, Folashade Agusto
bioRxiv 041897; doi: https://doi.org/10.1101/041897

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