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In 2006, national influenza surveillance was implemented in Vietnam. Epidemiologic and demographic data and a throat swab for influenza testing were collected from a subset of outpatients with influenza-like illness (ILI). During January 1, 2006 through December 31, 2007, of 184,521 ILI cases identified at surveillance sites, 11,082 were tested and 2112 (19%) were positive for influenza by reverse transcription polymerase chain reaction. Influenza viruses were detected year-round, and similar peaks in influenza activity were observed in all surveillance regions, coinciding with cooler and rainy periods. Studies are needed to ascertain the disease burden and impact of influenza in Vietnam.

Original publication

DOI

10.1016/j.vaccine.2009.09.139

Type

Journal article

Journal

Vaccine

Publication Date

11/12/2009

Volume

28

Pages

398 - 402

Keywords

Adolescent, Adult, Age Distribution, Child, Child, Preschool, Geography, Humans, Infant, Infant, Newborn, Influenza, Human, Middle Aged, Population Surveillance, Vietnam, Young Adult