![Figure 1. History and origin of porcine influenza A viruses (IAV) currently in circulation in Europe. It
should be noted that none of these porcine IAV rooted in swine populations.](https://www.pig333.com/3tres3_common/art/pig333/11991/home.jpg?w=650&h=366&ho=1&ts=1653979446)
Influenza A virus in swine: situation in European countries
In the wake of the so-called “swine flu” a European surveillance program was carried out in 2013-2015: H1N1pdm is present in several European countries, and at particularly high prevalence in Britain and Ireland.