title: The impact of the pandemic influenza A(H1N1) 2009 virus on seasonal influenza A viruses in the southern hemisphere, 2009.
abstract: Data collected over winter 2009 by five World Health Organisation National Influenza Centres in the southern hemisphere were used to examine the circulation of pandemic and seasonal influenza A strains during the first pandemic wave in the southern hemisphere.There is compelling evidence that the pandemic influenza A(H1N1) 2009 virus significantly displaced seasonal influenza A(H1N1) and, to a lesser extent, A(H3N2) viruses circulating in the southern hemisphere. Complete replacement of seasonal influenza A strains, however, was not observed during the first pandemic wave.
authors.affiliation: Centre for Infectious Diseases and Microbiology Laboratory Services, Institute of Clinical Pathology and Medical Research, Westmead Hospital, Westmead, New South Wales, Australia. ccblyth@meddent.uwa.edu.au
authors.forename: C C
authors.initials: CC
authors.lastname: Blyth
authors.forename: A
authors.initials: A
authors.lastname: Kelso
authors.forename: K A
authors.initials: KA
authors.lastname: McPhie
authors.forename: V M
authors.initials: VM
authors.lastname: Ratnamohan
authors.forename: M
authors.initials: M
authors.lastname: Catton
authors.forename: J D
authors.initials: JD
authors.lastname: Druce
authors.forename: D W
authors.initials: DW
authors.lastname: Smith
authors.forename: S H
authors.initials: SH
authors.lastname: Williams
authors.forename: Q S
authors.initials: QS
authors.lastname: Huang
authors.forename: L
authors.initials: L
authors.lastname: Lopez
authors.forename: B D
authors.initials: BD
authors.lastname: Schoub
authors.forename: M
authors.initials: M
authors.lastname: Venter
authors.forename: D E
authors.initials: DE
authors.lastname: Dwyer
mesh_terms: D005843:Geography; D006801:Humans; D053118:Influenza A Virus, H1N1 Subtype / Q000302:isolation & purification; D053122:Influenza A Virus, H3N2 Subtype / Q000302:isolation & purification; D007251:Influenza, Human / Q000453:epidemiology*; D058873:Pandemics; D012621:Seasons; D014944:World Health Organization