Epidemiologic study of human influenza infection in Korea from 1999 to 2007: origin and evolution of A/Fujian/411/2002-like strains

摘要

Following an outbreak of the A/Fujian/411/2002-like strains in Asia including China, Japan, and Korea in 2002, Australia and New Zealand experienced substantial outbreaks of the same strains in 2003 and worldwide in the 2003-2004 season. There was a continuous circulation of human influenza A/H3N2 viruses in East and Southeast Asia via a regional network from which epidemics in the temperate regions were seeded.Materials and methodsThe virus isolates obtained from nasopharyngeal swab specimens from outpatients were typed and subtyped by the hemagglutination (HA) inhibition assay.