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Title: Periods of high dengue transmission defined by rainfall do not impact efficacy of dengue vaccine in regions of endemic disease
Authors: Chloé Pasin
M. Elizabeth Halloran
Peter B. Gilbert
Edith Langevin
R. Leon Ochiai
Punnee Pitisuttithum
Maria Rosario Capeding
Gabriel Carrasquilla
Carina Frago
Margarita Cortés
Laurent Chambonneau
Zoe Moodie
Bordeaux Population Health
Fundacion Santa Fe de Bogota
Sanofi Pasteur SA
University of Washington, Seattle
Mahidol University
Ecole Normale Superieure de Cachan
Fred Hutchinson Cancer Research Center
Vaccine Research Institute
Sanofi Pasteur
Sanofi Pasteur
Keywords: Agricultural and Biological Sciences;Biochemistry, Genetics and Molecular Biology
Issue Date: 1-Dec-2018
Citation: PLoS ONE. Vol.13, No.12 (2018)
Abstract: © 2018 Pasin et al.This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Objective To evaluate the association of rainy season with overall dengue disease incidence and with the efficacy of the Sanofi Pasteur recombinant, live, attenuated, tetravalent vaccine (CYDTDV) in two randomized, controlled multicenter phase III clinical trials in Asia and Latin America. Methods Rainy seasons were defined for each study site using climatological information from the World Meteorological Organization. The dengue attack rate in the placebo group for each study month was calculated as the number of symptomatic, virologically-confirmed dengue events in a given month divided by the number of participants at risk in the same month. Time-dependent Cox proportional hazard models were used to test whether rainy season was associated with dengue disease and whether it modified vaccine efficacy in each of the two trials and in both of the trials combined. Findings Rainy season, country, and age were all significantly associated with dengue disease in both studies. Vaccine efficacy did not change during the rainy season in any of the analyses. Conclusions Although dengue transmission and exposure are expected to increase during the rainy season, our results indicate that CYD-TDV vaccine efficacy remains constant throughout the year in endemic regions.
ISSN: 19326203
Appears in Collections:Scopus 2018

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