date:Oct 18, 2013
e they are susceptible to infections with both avian and human influenza A viruses and can play a role in interspecies transmission. This can lead to co-infection and genetic reassortment of viruses of swine, human or avian origin. Today, influenza is a common infection of pigs worldwide, sometimes causing severe respiratory disease in non-immune animals. Infection is maintained in endemic cycles without clear seasonality. Currently, H1N1, H1N2 and H3N2 are the predominant subtypes of swine infl