The 2009 Flu outbreak is a new strain of influenza, which the authorities have recently decided should not be called "swine flu". The CDC has confirmed that U.S. cases were found to be made up of genetic elements from four different flu viruses – North American swine influenza, North American avian influenza, human influenza, and swine influenza virus typically found in Asia and Europe. Get more info on the Flu Wiki at flu.wikia.com.