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Some basic information from the Centers for Disease Control and Prevention:
In 2011, a specific H3N2 virus was detected with genes from avian, swine and human viruses and the 2009 H1N1 pandemic virus M gene. The virus was circulating in pigs in 2010 and was first detected in people in 2011.The acquisition of the 2009 M gene may make this virus infect humans more easily than is typical for other swine influenza viruses. There were 12 human infections with this virus, termed H3N2v, in 2011; most were associated with exposure to pigs. In 2012, H3N2v outbreaks in humans associated with exposure to pigs began in July.
How can a person catch a virus from a pig?
Influenza viruses can spread from pigs to people and from people to pigs. Spread from infected pigs to humans is thought to happen in the same way that seasonal influenza viruses spread between people; mainly through infected droplets created when an infected pig coughs or sneezes. If these droplets land in the nose or mouth, or are inhaled, a person can be infected. There also is some evidence that people can become infected by touching something that has the virus on it and then touching their own mouth or nose. A third possible way to get infected is to inhale dust containing influenza virus.
Related Information to Further Knowledge
Department of Health Services Reports First Human Cases of H3N2v Influenza