Documented avian influenza infections in humans (1997-2006)
Data as of 21 December 2009

Period*SubtypeSiteCases (lab confirmed)Deaths (lab confirmed)Source of infectionEvidence of human to human transmission
1997
H5N1
Hong Kong SAR
18
6
Chicken
Ducks
Geese
Yes
1999
H9N2
Hong Kong SAR
2
0
Chicken
Possible
2002
H7N2
Virginia, USA
1
0
Chicken
No
2003
H5N1
China
Hong Kong SAR
Vietnam
1
2
3
1
1
3
unknown
Chicken
Poultry
No
No
No
2003
H7N2
New York, USA
1
0
Unknown
No
2003
H7N7
Netherlands, Belgium, Germany
89
1
Chicken
Yes**
2003
H9N2
Hong Kong SAR
1
0
Chicken
No
2004
H5N1
Thailand
Vietnam
17
29
12
20
Poultry
Possible
Possible
2004
H7N3
Canada
2
0
Poultry
No
2005
H5N1
Cambodia
China
Indonesia
Thailand
Vietnam
4
8
20
5
61
4
5
13
2
19
Poultry
No
No
No
No
Possible
2006
H5N1
Azerbaijan
Cambodia
China
Djibouti
Egypt
Indonesia
Iraq
Thailand
Turkey
8
2
13
1
18
55
3
3
12
5
2
8
0
10
45
2
3
4
Poultry
Wild Birds
No
No
No
No
No
Possible
No
No
No
2006
H7N3
United Kingdom
1
0
Poultry
No
2007
H5N1
Cambodia
China
Egypt
Indonesia
Laos
Myanmar
Nigeria
Pakistan
Vietnam
1
5
25
42
2
1
1
3
8
1
3
9
37
2
0
1
1
5
Poultry
Birds
Unknown
No
No
No
No
No
No
No
Possible
No
2007
H7N2
United Kingdom
4
0
Poultry
No
2008
H5N1
Bangladesh
Cambodia
China
Egypt
Indonesia
Vietnam
1
1
4
8
24
6
0
0
4
4
20
5
Poultry
Unknown
Poultry/birds
No
No
No
No
No
No
2009
H5N1
Cambodia
China
Egypt
Vietnam
1
7
39
5
0
4
4
5
Unknown
Poultry/Unknown
No
No
No
No
* Cases are allocated to a period on the basis of the date of onset of clinical symptoms
** Evidence of conjunctivitis in three cases within families
Health Threats Unit - Directorate General Health and Consumer Protection - European Commission Source: WHO