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Temporal Patterns of Influenza A and B in Tropical and Temperate Countries: What Are the Lessons for Influenza Vaccination?

Saverio Caini 1, * Winston Andrade 2 Selim Badur 3 Angel Balmaseda 4 Amal Barakat 5 Antonino Bella 6 Abderrahman Bimohuen 5 Lynnette Brammer 7 Joseph Bresee 7 Alfredo Bruno 8 Leticia Castillo 9 Meral Ciblak 3 Alexey Clara 10 Cheryl Cohen 11 Jeffery Cutter 12 Coulibaly Daouda 13 Celina de Lozano 14 Domenica de Mora 8 Kunzang Dorji 15 Gideon Emukule 16 Rodrigo Fasce 2 Luzhao Feng 17 Aparecida Walquiria 18 Raquel Guiomar 19 Jean-Michel Heraud 20 Olha Holubka 21 Q. Sue Huang 22 Herve Kadjo 13 Lyazzat Kiyanbekova 23 Herman Kosasih 24 Gabriela Kusznierz 25 Jenny Lara 26 Ming Li 17 Liza Lopez 22 Mai Hoang 27 Pessanha Henriques 18 Maria Matute 28 Alla Mironenko 21 Brechla Moreno 29 Joshua Mott 16 Richard Njouom 30 N Nurhayati 24 Akerke Ospanova 23 Rhonda Owen 31 Richard Pebody 32 Kate Pennington 31 Simona Puzelli 6 Quynh Le 27 Norosoa Razanajatovo 20 Ana Rodrigues 33 Juan Rudi 25 Raymond Tzer Pin Lin 12 Marietjie Venter 34 Marie-Astrid Vernet 30 Sonam Wangchuk 15 Juan Yang 17 Hongjie Yu 17 Maria Zambon 32 François Schellevis 1 John Paget 35
* Corresponding author
1 Netherlands Institute for Health Services Research
2 ISP - Instituto de Salud Pública de Chile
3 Istanbul University
4 MINSA - Ministry of Health [Nicaragua]
5 Ministry of Health [Morocco]
6 Istituto Superiore di Sanita [Rome]
7 CDC - Centers for Disease Control and Prevention [Atlanta]
8 INSPI - Instituto Nacional de Investigación en Salud Pública [Guayaquil, Ecuador]
9 MSPAS - Ministerio de Salud Publica y Asistencia Social [Guatemala]
10 US Centers for Disease Control
11 WITS - University of the Witwatersrand [Johannesburg]
12 Ministry of Health
13 Institut Pasteur de Côte d'Ivoire
14 MINSAL - Ministerio de Salud de El Salvador
15 Ministry of Health [Bhoutan]
16 US Centers for Disease Control and Prevention
17 Chinese Center for Disease Control and Prevention
18 Ministry of Health
19 Instituto nacional de saude
20 IPM - Unité de Virologie [Antananarivo, Madagascar]
21 National Academy of Medical Sciences of Ukraine
22 ESR - Institute of Environmental Science and Research
23 Astana Center of Sanitary Epidemiology Expertise
24 US Naval Medical Research Unit n°2
25 Instituto Nacional de Enfermedades Respiratorias “Dr. Emilio Coni”
26 Ministry of Health [Costa Rica]
27 NIHE - National Institute of Hygiene and Epidemiology [Hanoi, Vietnam]
28 SESAL - Ministry of Health [Honduras]
29 National Influenza Center
30 Centre Pasteur du Cameroun
31 DHAISS - Office of Health Protection, Woden, ACT, Australia
32 Public Health England [London]
33 National Institute of Health
34 University of Pretoria [South Africa]
35 Netherlands Institute for Health Services Research
Abstract : INTRODUCTION: Determining the optimal time to vaccinate is important for influenza vaccination programmes. Here, we assessed the temporal characteristics of influenza epidemics in the Northern and Southern hemispheres and in the tropics, and discuss their implications for vaccination programmes. METHODS: This was a retrospective analysis of surveillance data between 2000 and 2014 from the Global Influenza B Study database. The seasonal peak of influenza was defined as the week with the most reported cases (overall, A, and B) in the season. The duration of seasonal activity was assessed using the maximum proportion of influenza cases during three consecutive months and the minimum number of months with ≥80% of cases in the season. We also assessed whether co-circulation of A and B virus types affected the duration of influenza epidemics. RESULTS: 212 influenza seasons and 571,907 cases were included from 30 countries. In tropical countries, the seasonal influenza activity lasted longer and the peaks of influenza A and B coincided less frequently than in temperate countries. Temporal characteristics of influenza epidemics were heterogeneous in the tropics, with distinct seasonal epidemics observed only in some countries. Seasons with co-circulation of influenza A and B were longer than influenza A seasons, especially in the tropics. DISCUSSION: Our findings show that influenza seasonality is less well defined in the tropics than in temperate regions. This has important implications for vaccination programmes in these countries. High-quality influenza surveillance systems are needed in the tropics to enable decisions about when to vaccinate.
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Saverio Caini, Winston Andrade, Selim Badur, Angel Balmaseda, Amal Barakat, et al.. Temporal Patterns of Influenza A and B in Tropical and Temperate Countries: What Are the Lessons for Influenza Vaccination?. PLoS ONE, Public Library of Science, 2016, 11 (3), pp.e0152310. ⟨10.1371/journal.pone.0152310⟩. ⟨pasteur-01675327⟩

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Les métriques sont temporairement indisponibles