title: Influenza A(H1N1)pdm09 during air travel.
abstract: The global spread of the influenza A(H1N1)pdm09 virus (pH1N1) associated with travelers from North America during the onset of the 2009 pandemic demonstrates the central role of international air travel in virus migration. To characterize risk factors for pH1N1 transmission during air travel, we investigated travelers and airline employees from four North American flights carrying ill travelers with confirmed pH1N1 infection. Of 392 passengers and crew identified, information was available for 290 (74%) passengers were interviewed. Overall attack rates for acute respiratory infection and influenza-like illness 1-7 days after travel were 5.2% and 2.4% respectively. Of 43 individuals that provided sera, 4 (9.3%) tested positive for pH1N1 antibodies, including 3 with serologic evidence of asymptomatic infection. Investigation of novel influenza aboard aircraft may be instructive. However, beyond the initial outbreak phase, it may compete with community-based mitigation activities, and interpretation of findings will be difficult in the context of established community transmission.
authors.affiliation: US Centers for Disease Control and Prevention, Atlanta, GA 30333, USA.
authors.forename: John
authors.initials: J
authors.lastname: Neatherlin
authors.forename: Elaine H
authors.initials: EH
authors.lastname: Cramer
authors.forename: Christine
authors.initials: C
authors.lastname: Dubray
authors.forename: Karen J
authors.initials: KJ
authors.lastname: Marienau
authors.forename: Michelle
authors.initials: M
authors.lastname: Russell
authors.forename: Hong
authors.initials: H
authors.lastname: Sun
authors.forename: Melissa
authors.initials: M
authors.lastname: Whaley
authors.forename: Kathy
authors.initials: K
authors.lastname: Hancock
authors.forename: Krista K
authors.initials: KK
authors.lastname: Duong
authors.forename: Hannah L
authors.initials: HL
authors.lastname: Kirking
authors.forename: Christopher
authors.initials: C
authors.lastname: Schembri
authors.forename: Jacqueline M
authors.initials: JM
authors.lastname: Katz
authors.forename: Nicole J
authors.initials: NJ
authors.lastname: Cohen
authors.forename: Daniel B
authors.initials: DB
authors.lastname: Fishbein
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D064870:Air Travel / Q000706:statistics & numerical data*; D000401:Aircraft; D002648:Child; D002675:Child, Preschool; D016358:Contact Tracing; D005260:Female; D006801:Humans; D053118:Influenza A Virus, H1N1 Subtype / Q000235:genetics / Q000302:isolation & purification*; D007251:Influenza, Human / Q000453:epidemiology* / Q000635:transmission* / Q000821:virology; D008297:Male; D008875:Middle Aged; D058873:Pandemics; D014481:United States