Temporal patterns of influenza A and B in tropical and temperate countries : what are the lessons for influenza vaccination?

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dc.contributor.author Caini, Saverio
dc.contributor.author Andrade, Winston
dc.contributor.author Badur, Selim
dc.contributor.author Balmaseda, Angel
dc.contributor.author Barakat, Amal
dc.contributor.author Bella, Antonino
dc.contributor.author Bimohuen, Abderrahman
dc.contributor.author Brammer, Lynnette
dc.contributor.author Bresee, Joseph
dc.contributor.author Bruno, Alfredo
dc.contributor.author Castillo, Leticia
dc.contributor.author Ciblak, Meral A.
dc.contributor.author Clara, Alexey W.
dc.contributor.author Cohen, Cheryl
dc.contributor.author Cutter, Jeffery
dc.contributor.author Daouda, Coulibaly
dc.contributor.author De Lozano, Celina
dc.contributor.author De Mora, Domenica
dc.contributor.author Dorji, Kunzang
dc.contributor.author Emukule, Gideon O.
dc.contributor.author Fasce, Rodrigo A.
dc.contributor.author Feng, Luzhao
dc.contributor.author De Almeida, Walquiria Aparecida Ferreira
dc.contributor.author Guiomar, Raquel
dc.contributor.author Heraud, Jean-Michel
dc.contributor.author Holubka, Olha
dc.contributor.author Huang, Q. Sue
dc.contributor.author Kadjo, Herve A.
dc.contributor.author Kiyanbekova, Lyazzat
dc.contributor.author Kosasih, Herman
dc.contributor.author Kusznierz, Gabriela
dc.contributor.author Lara, Jenny
dc.contributor.author Li, Ming
dc.contributor.author Lopez, Liza
dc.contributor.author Hoang, Phuong Vu Mai
dc.contributor.author Henriques, Cláudio Maierovitch Pessanha
dc.contributor.author Matute, Maria Luisa
dc.contributor.author Mironenko, Alla
dc.contributor.author Moreno, Brechla
dc.contributor.author Mott, Joshua A.
dc.contributor.author Njouom, Richard
dc.contributor.author Nurhayati
dc.contributor.author Ospanova, Akerke
dc.contributor.author Owen, Rhonda
dc.contributor.author Pebody, Richard
dc.contributor.author Pennington, Kate
dc.contributor.author Puzelli, Simona
dc.contributor.author Quynh Le, Mai thi
dc.contributor.author Razanajatovo, Norosoa Harline
dc.contributor.author Rodrigues, Ana
dc.contributor.author Rudi, Juan Manuel
dc.contributor.author Pin Lin, Raymond Tzer
dc.contributor.author Venter, Marietjie
dc.contributor.author Vernet, Marie-Astrid
dc.contributor.author Wangchuk, Sonam
dc.contributor.author Yang, Juan
dc.contributor.author Yu, Hongjie
dc.contributor.author Zambon, Maria
dc.contributor.author Schellevis, François
dc.contributor.author Paget, John
dc.contributor.author Global Influenza B Study
dc.date.accessioned 2016-08-01T05:38:33Z
dc.date.available 2016-08-01T05:38:33Z
dc.date.issued 2016-03-31
dc.description S1 File. Contact information of data owners. en_ZA
dc.description.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. en_ZA
dc.description.department Medical Virology en_ZA
dc.description.librarian am2016 en_ZA
dc.description.sponsorship Sanofi Pasteur en_ZA
dc.description.uri http://www.plosone.org en_ZA
dc.identifier.citation Caini S, Andrade W, Badur S, Balmaseda A, Barakat A, Bella A, et al. (2016) Temporal Patterns of Influenza A and B in Tropical and Temperate Countries: What Are the Lessons for Influenza Vaccination? PLoS ONE 11(3): e0152310. DOI: 10.1371/journal.pone.0152310. en_ZA
dc.identifier.issn 1932-6203
dc.identifier.other 10.1371/journal.pone.0152310
dc.identifier.uri http://hdl.handle.net/2263/56138
dc.language.iso en en_ZA
dc.publisher Public Library of Science en_ZA
dc.rights The work is made available under the Creative Commons CC0 licence. en_ZA
dc.subject Vaccination programmes en_ZA
dc.subject Global Influenza B Study en_ZA
dc.subject Influenza epidemics en_ZA
dc.subject Influenza A virus en_ZA
dc.subject Influenza B virus en_ZA
dc.title Temporal patterns of influenza A and B in tropical and temperate countries : what are the lessons for influenza vaccination? en_ZA
dc.type Article en_ZA


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