Is this H1N1 (swine) flu virus contagious?
CDC has determined that this H1N1 influenza A (swine) virus is contagious and is spreading from human to human. However, at this time, it is not known how easily the virus spreads between people.
Are there human infections with H1N1 flu in the U.S.?
In late March and early April 2009, cases of human infection with H1N1 influenza A (swine) viruses were first reported in Southern California and near San Antonio, Texas. Other U.S. states have reported cases of H1N1 flu infection in humans and cases have been reported internationally as well. An updated case count of confirmed H1N1 flu infections in the United States is kept at http://www.cdc.gov/swineflu/investigation.htm CDC and local and state health agencies are working together to investigate this situation.