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Table 2 Sporadic infections in pigs with influenza A viruses of avian origin

From: Are pigs overestimated as a source of zoonotic influenza viruses?

Continent

Country

Subtype

Year

References

North America

Canada

H4N6

1999

[92]

H3N3

2001

[103]

H1N1

2002

[103]

United States

H4N6

2015

[93]

Asia

China

H9N2

1998–2007

[94, 94, 104]

H7N2

2001

[95]

H10N5

2008

[96]

H5N1

2008–2009

[97]

H4N1

2009

[101]

H6N6

2010

[99]

H3N2

2011

[100]

H4N8

2011

[101]

Indonesia

H5N1

2005–2007

[105]

Korea

H5N2

2008

[106]

Europe

Belgium*

H1N1

1979

[17, 107]

England

H1N7

1992

[108]

  1. *First detected in Belgium, H1avN1 spread rapidly through other European countries