Table 1 Human infections with influenza A viruses of porcine origin

North America

United States

A(H3N2)v

2010/11

7

n.d

[33]

2012

315 (283, 2 ic)

306 TRIG; M H1N1pdm09; 9 n.d

[34, 33]

2012/13

20

n.d

[33]

2013/14

3

n.d

[33]

2015

3 (1 ic)

n.d

[35, 36]

2016

18 (16)

H3hu

[27, 29, 37]

2017

62 (37)

H3hu

[28, 38, 39]

2018

2 (1)

n.d

[33, 40]

2020

1

n.d

[41]

2021

2 (1)

1 H3hu; 1 n.d

[33, 42]

2021/22

1

n.d

[33]

A(H1N1)v

2011/12

2

n.d

[33]

2012/13

2

n.d

[33]

2015

3

n.d

[35]

2015/16

1

n.d

[33]

2017

1

H1N1pdm09

[43, 38, 44]

2019

1 ic

H1N1pdm09

[43, 45, 46]

2020/21

8

1 H1N1pdm09; 7 n.d

[43, 33, 41, 47]

A(H1N2)v

2011/12

4

n.d

[33, 47]

2015/16

3

n.d

[37]

2017

4 (3)

n.d

[38, 48, 49]

2018

14 (12)

n.d

[40, 50]

2020/21

4

n.d

[33]

2021/22

1

n.d

[33]

Canada

A(H3N2)v

2016

1

n.d

[37]

A(H1N2)v

2020

1 (1)

n.d

[45, 51]

South America

Brazil

A(H1N2)v

2015

1

n.d

[35, 52]

2020

2 (1)

n.d

[45, 53]

Europe

Germany

A(H1N1)v

2010

1 ic

H1avN1

[54]

2011

1 (1)

H1avN1

[54]

2020

1 (1)

H1avN1

[45, 53]

2021

1 (1)

H1avN1

[55]

A(H1N2)v

2011

1 (1)

H1huN2

[54]

Italy

A(H1N1)v

2016

1

H1avN1

[37, 56]

Switzerland

A(H1N1)v

2016

1

H1avN1

[37, 56]

2017

1

H1avN1

[38, 39]

Netherlands

A(H1N1)v

2016

1 (1)

H1avN1

[37]

2019

1

H1avN1

[57]

2020

1 ic

H1avN1

[42]

France

A(H1N1)v

2018

1

H1N1pdm09

[58]

Asia

China

A(H1N1)v

2012

1 (1)

H1avN1

[59]

2015

1 (1)

H1avN1

[60]

2016

4 (3)

H1avN1

[61, 62]

2019

1

H1avN1

[40]

2020

5 (5)

H1avN1

[42, 45]

2021

6

n.d

[63]

Australia

A(H3N2)v

2018

1

n.d

[40]

2019

1 (1)

n.d

[64]

2021

1 (1)

H3hu

[47]