3CENTERS FOR DISEASE CONTROL AND PREVENTION. Outbreak of swlne-origin influenza A (H1N1) virus infection-Mexico, March-April 2009[J]. MMWR Morb Mortal Wkly Rep ,2009 ,58 :467-470.
4NOVEL SWINE-ORIGIN INFLUENZA A (H1N1) VIRUS INVESTIGATION TEAN. Emergence of a novel swine-origin influenza A ( H1N1 ) virus in humans[ J]. N Engl J Med ,2009,360:2667-2668.
5CAO BIN,LI XING-WANG, SHU YUE-LING ,et al. Clinical and epidemiologic characteristics of 3 early eases of influenza A Pandemic ( H1N1 ) 2009 virus infection, People's Republic of China,2009 [ J].Emerg Infect Dis,2009,15(9) :1418-1422.
7CENTERS FOR DISEASE CONTROL AND PREVENTION. Swine-Origin influenza A (H1N1) virus infections in a school-New York city,April 2009[ J]. MMWR Morb Mortal Wkly Rep ,2009,58:470-472.
8CENTERS FOR DISEASE CONTROL AND PREVENTION. Swine influenza A ( H1N1 ) infection in two children-southren ealifomia, March-April 2009 [ J]. MMWR Morb Mortal Wkly Rep ,2009,58:400-402.
1KNIPE D M, HOWLEY P M. Fields mimgy [ M ]. Forth Edition. Philadelphia: Lippincott Williams & Wilkins,2001:1538-1551.
2FOVCHIER R A, MUMSTER V, WALLNSTEN A ,et al. Characterzation of a novel influenza A virus hemagglutinin subtype(H16) obtained from black-headed gulls[J]. J virol,2005,79( 3 ) :2814-2822.
4WALLENSTEN A, MUNSTER V, LATORRE-MARGALE F, et al. Surveillance of influenza A virus in migratory Waterfowl in Northern Europe [J]. Emerg Infect Dis,2007,13(3) :404-411.
5HERBERT S Z,GABRIELSON I. Birds[M]. New york:Golden Books, 1987:9-14.
7ITO T,SUZUKI Y,SUZUKI T,et al. Recognition of galaetose by the alpha2,3 linkage is associated With intestinal relication of influenza A Virus in ducks[J]. J Virol,2000,74(7) :9300-9305.
8RICHMAN D D. Orthomyxoviruses and para myxoviruses [C]. In BRAUDE A J. Microbiology [ M ]. Philadelphia: W B Saunders Company, 1982 : 569 -584.
9LAVEW W G, WEBSTER R G. Studies on the origin of pandemic influenza,3. Eviedence implicating duck and eguine influenza viruses as possible progenitors of the Hong Kong Strain of human influenza[J]. Virol, 1973,51 ( 1 ) :383-391.
10GORMAN O T, BEAN W J, KAWAOKA Y, et al. Evolution of influenza A Virus nucleoprotein genes: implications for the origin of HIN1 human and classical swine Viruses [J]. J Virol, 1991,65 ( 4 ) : 3704-3714.
1Centers for disease control and prevention(CDC). Swine influenza A( H1N1 ) infection in two children Southern Califomia, March - April 2009[ J]. MMWR,2009,58( 15 ) :400 -402.
2Smith GJD, Vijaykrishna D, Bahl J, et al. Origins and evolutionary genomics of the 2009 swine -origin H1Nlinfluenza A epidemic[J]. Nature, 2009, 459 (7250) :1122 - 1125.
3Shinde V, Bridges CB, Uyeki TM, et al. Triple - reassortant swine influenza A (H1) in humans in the United States, 2005 -2009[ J]. N Engl J Med, 2009, 360(25):2616 -2625.
4Boelle P, BemiUon P, Desencios J. A preliminary estimation of the reproduction ratio for new influenza A (H1N1) from the outbreak in Mexico, March - Apri 2009 [ J ]. Euro Surveill, 2009,14 : 19205.
5Novel 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 (25) :2605 - 2615.
6Hancock K, Veguilla V, Xiuhua L, et al. Cross -reactiveantibody responses to the 2009 pandemic H1 N1 influenza virus[J]. N Engl J Med, 2009, 361(20): 1945 -1952.
7Garten R J, Davis CT, Russell CA, et al. Antigenic and genetic characteristics of the early isolates of swine - origin 2009 A( H1 N1 ) influenza viruses circulating in humans [ J ]. Science, 2009, 325 (5937) : 197 - 201.
8WHO. Recommended viruses for influenza vaccines for use in the 2010 -2011 northern hemisphere influenza season [ J ]. Weekly Epidemiological Record, 2010, 85 (10) : 81 - 92.