3Novel Swine-Origin Influenza A(H1N1)Virus Investigation Team.Emergence of a novel swine-origin influenza A(H1N1)virus in humans[J].N Engl J Med 2009; 360:2605-15.
4Trifonov V,Khiabanian H,Greenbaum B,Rabadan R.The origin of the recent swine influenza A(H1N1)virus infectinghumans[J].Euro Surveill 2009;14:pii=19193.