Volume 19, Number 11—November 2013
Research
Migration and Persistence of Human Influenza A Viruses, Vietnam, 2001–2008
Table 1
Virus subtype, geographic region | Year |
|||||||
---|---|---|---|---|---|---|---|---|
2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | |
H3N2 | ||||||||
Northern | 1 | 0 | 4 | 18 | 4 | 0 | 66 | 0 |
Central | 0 | 0 | 9 | 2 | 19 | 1 | 8 | 13 |
Southern |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
H1N1 | ||||||||
Northern | 6 | 2 | 24 | 0 | 1 | 6 | 0 | 6 |
Central | 0 | 0 | 1 | 0 | 2 | 4 | 0 | 36 |
Southern | 0 | 0 | 0 | 0 | 0 | 6 | 0 | 1 |
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