“
The virus that has caused these infections is viruses are actually very interesting. They contain genetic segments as Dr. Schuchat said from four different virus sources. So we have some gene segments that are North American swine influenza viruses. Some gene segments North American avian influenza viruses. One gene segment from a human influenza virus and two gene segments that are normally found from swine influenza viruses in Asia and in Europe.
Dr Nancy Cox, Director/Influenza Division - CDC Press Briefing Transcripts April 23, 2009
