National influenza surveillance in Vietnam, 2006-2007.
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.
National Institute of Hygiene and Epidemiology, Hanoi, Viet Nam.
Hien T
HT
Nguyen
Nila J
NJ
Dharan
Mai T Q
MT
Le
Nguyen B
NB
Nguyen
Chung T
CT
Nguyen
Dong V
DV
Hoang
Huu N
HN
Tran
Chien T
CT
Bui
Dat T
DT
Dang
Dinh N
DN
Pham
Hoa T
HT
Nguyen
Tu V
TV
Phan
David T
DT
Dennis
Timothy M
TM
Uyeki
Joshua
J
Mott
Yen T
YT
Nguyen
D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D002648:Child; D002675:Child, Preschool; D005843:Geography; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007251:Influenza, Human / Q000453:epidemiology*; D008875:Middle Aged; D011159:Population Surveillance; D014744:Vietnam / Q000453:epidemiology; D055815:Young Adult