Influenza Epidemics in the United States, France, and Australia, 1972–19971

Influenza epidemics occur once a year during the winter in temperate areas. Little is known about the similarities between epidemics at different locations. We have analyzed pneumonia and influenza deaths from 1972 to 1997 in the United States, France, and Australia to examine the correlation over s...

Full description

Bibliographic Details
Main Authors:	Viboud, Cécile, Boëlle, Pierre-Yves, Pakdaman, Khashayar, Carrat, Fabrice, Valleron, Alain-Jacques, Flahault, Antoine
Format:	Online
Language:	English
Published:	Centers for Disease Control and Prevention 2004
Online Access:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3322745/

id	pubmed-3322745
recordtype	oai_dc
spelling	pubmed-33227452012-04-16 Influenza Epidemics in the United States, France, and Australia, 1972–19971 Viboud, Cécile Boëlle, Pierre-Yves Pakdaman, Khashayar Carrat, Fabrice Valleron, Alain-Jacques Flahault, Antoine Research Influenza epidemics occur once a year during the winter in temperate areas. Little is known about the similarities between epidemics at different locations. We have analyzed pneumonia and influenza deaths from 1972 to 1997 in the United States, France, and Australia to examine the correlation over space and time between the three countries. We found a high correlation in both areas between France and the United States (correlation in impact, Spearman’s ρ = 0.76, p < 0.001, and test for synchrony in timing of epidemics, p < 0.001). We did not find a similar correlation between the United States and Australia or between France and Australia, when considering a systematic half-year lead or delay of influenza epidemics in Australia as compared with those in the United States or France. These results support a high correlation at the hemisphere level and suggest that the global interhemispheric circulation of epidemics follows an irregular pathway with recurrent changes in the leading hemisphere. Centers for Disease Control and Prevention 2004-01 /pmc/articles/PMC3322745/ /pubmed/15078594 http://dx.doi.org/10.3201/eid1001.020705 Text en
repository_type	Open Access Journal
institution_category	Foreign Institution
institution	US National Center for Biotechnology Information
building	NCBI PubMed
collection	Online Access
language	English
format	Online
author	Viboud, Cécile Boëlle, Pierre-Yves Pakdaman, Khashayar Carrat, Fabrice Valleron, Alain-Jacques Flahault, Antoine
spellingShingle	Viboud, Cécile Boëlle, Pierre-Yves Pakdaman, Khashayar Carrat, Fabrice Valleron, Alain-Jacques Flahault, Antoine Influenza Epidemics in the United States, France, and Australia, 1972–19971
author_facet	Viboud, Cécile Boëlle, Pierre-Yves Pakdaman, Khashayar Carrat, Fabrice Valleron, Alain-Jacques Flahault, Antoine
author_sort	Viboud, Cécile
title	Influenza Epidemics in the United States, France, and Australia, 1972–19971
title_short	Influenza Epidemics in the United States, France, and Australia, 1972–19971
title_full	Influenza Epidemics in the United States, France, and Australia, 1972–19971
title_fullStr	Influenza Epidemics in the United States, France, and Australia, 1972–19971
title_full_unstemmed	Influenza Epidemics in the United States, France, and Australia, 1972–19971
title_sort	influenza epidemics in the united states, france, and australia, 1972–19971
description	Influenza epidemics occur once a year during the winter in temperate areas. Little is known about the similarities between epidemics at different locations. We have analyzed pneumonia and influenza deaths from 1972 to 1997 in the United States, France, and Australia to examine the correlation over space and time between the three countries. We found a high correlation in both areas between France and the United States (correlation in impact, Spearman’s ρ = 0.76, p < 0.001, and test for synchrony in timing of epidemics, p < 0.001). We did not find a similar correlation between the United States and Australia or between France and Australia, when considering a systematic half-year lead or delay of influenza epidemics in Australia as compared with those in the United States or France. These results support a high correlation at the hemisphere level and suggest that the global interhemispheric circulation of epidemics follows an irregular pathway with recurrent changes in the leading hemisphere.
publisher	Centers for Disease Control and Prevention
publishDate	2004
url	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3322745/
_version_	1611519882114891776

Influenza Epidemics in the United States, France, and Australia, 1972–19971

Similar Items