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Volume 19, Number 11—November 2013
Research

Migration and Persistence of Human Influenza A Viruses, Vietnam, 2001–2008

Mai Quynh Le, Ha Minh Lam, Vuong Duc Cuong, Tommy Tsan-Yuk Lam, Rebecca A Halpin, David E Wentworth, Nguyen Tran Hien, Le Thi Thanh, Hoang Vu Mai Phuong, Peter Horby, and Maciej F. BoniComments to Author 
Author affiliations: National Institute for Hygiene and Epidemiology, Hanoi, Vietnam (M.Q. Le, V.D. Cuong, N.T. Hien, L.T. Thanh, H.V.M. Phuong); Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam (H.M. Lam, M.F. Boni); University of Edinburgh, Edinburgh, Scotland, UK (H.M. Lam); University of Oxford, Oxford, UK (T.T.-Y. Lam, P. Horby, M.F. Boni); The J. Craig Venter Institute, Rockville, Maryland, USA (R.A. Halpin, D. E. Wentworth); Oxford University Clinical Research Unit, Hanoi (P. Horby)

Main Article

Table 2

Observed migration of influenza virus between Vietnam and other countries*

Virus subtype, country Median no. events (95% range)
PB2 PB1 PA HA NP NA MP NS
H3N2
Aus/NZ 9 (5–13) 9 (5–13) 7 (4–10) 7 (3–10) 11 (6–16) 5 (2–8) 26 (19–33) 27 (18–36)
Hong Kong 4 (1–7) 4 (1–8) 6 (2–10) 5 (2–8) 6 (2–10) 7 (3.5–12) 12 (6–18) 5 (1–10.5)
Taiwan 2 (1–3) 3 (2–4) 3 (2–4) 3 (1–4) 2 (1–4) 1 (0–3) 3 (1–5) 2 (1–5)
Singapore
 1 (0–3)
 1 (0–3)
 0 (0–2)
 1 (0–3)
 1 (0–6)
 1 (0–3)
 0 (0–2)
 1 (0–3)
H1N1
Taiwan 3 (1–6) 3 (1–5) 4 (2–7) 5 (2–7) 5 (2–8) 4 (2–8) 5 (2–10) 5 (2–8)
Aus/NZ 2 (0–5) 1 (0–4) 2 (0–5) 2 (0–5) 4 (1–8) 2 (0–4) 5 (2–9) 2 (0–6)
Japan 2 (1–4) 2 (1–4) 2 (1–4) 3 (1–4) 4 (1–8) 1 (0–2) 6 (2–9) 4 (2–7)

*Data from 2,000 bootstrapped trees for all 8 segments of regional datasets for influenza subtypes H3N2 and H1N1. PB, polymerase basic protein; PA, polymerase acidic protein; HA, hemagglutinin; NP, nucleocapsid protein; MP, matrix protein; NS, nonstructural protein; Aus/NZ, Australia/New Zealand.

Main Article

Page created: October 31, 2013
Page updated: October 31, 2013
Page reviewed: October 31, 2013
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