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Sex-Specific Asymmetrical Attack Rates in Combined Sexual-Vectorial Transmission Epidemics

Fundação Getulio Vargas, Escola de Matemática Aplicada, Rio de Janeiro 22250-9000, Brazil
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These authors contributed equally to this work.
Microorganisms 2019, 7(4), 112; https://doi.org/10.3390/microorganisms7040112
Received: 24 January 2019 / Revised: 11 February 2019 / Accepted: 15 February 2019 / Published: 25 April 2019
(This article belongs to the Special Issue Emerging Vector Borne Infections: A Novel Threat for Global Health)
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Abstract

In 2015–2016, South America went through the largest Zika epidemic in recorded history. One important aspect of this epidemic was the importance of sexual transmission in combination with the usual vectorial transmission, with asymmetrical transmissibilities between sexual partners depending on the type of sexual contact; this asymmetry manifested itself in data as an increased risk to women. We propose a mathematical model for the transmission of the Zika virus including sexual transmission via all forms of sexual contact, as well as vector transmission, assuming a constant availability of mosquitoes. From this model, we derive an expression for R 0 , which is used to study and analyze the relative contributions of the male to female sexual transmission route vis-à-vis vectorial transmission. We also perform Bayesian inference of the model’s parameters using data from the 2016 Zika epidemic in Rio de Janeiro. View Full-Text
Keywords: epidemiology; ℛ0; vector-borne disease; sexually-transmitted disease epidemiology; 0; vector-borne disease; sexually-transmitted disease
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de Barros, A.C.W.G.; Santos, K.G.; Massad, E.; Coelho, F.C. Sex-Specific Asymmetrical Attack Rates in Combined Sexual-Vectorial Transmission Epidemics. Microorganisms 2019, 7, 112.

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