How does H1N1 flu infect humans?
In the past, occasional cases have been reported of the H1N1 flu virus infecting humans. This is rare because H1N1 flu viruses don’t easily attach to the cells of human throats and lungs. When it does happen, those most often infected are involved in farming or have had direct contact with infected pigs at, say, pork processing plants or livestock exhibitions. The H1N1 flu then can be passed from one human to another through sneezing, coughing or by touching an infected person or surface and then touching your nose or mouth.
