Swine influenza is a contagious respiratory disease of pigs. The disease is commonly seen in North and South America, Asia and Europe. Illness is cause by type A Influenza viruses, which also affect a range of other animals, as well as humans.
Swine, avian and human influenza viruses can combine within pig cells to form new influenza viruses. Flu-like symptoms in swine or people that may have had contact with swine should be reported to animal or public health professionals. Doing so will allow health authorities to maintain a current understanding of the viruses circulating in the animal and human populations.